Easy to use, easy to read. I like the convenience of the plugs being extended. I dropped a star because there is no explanation that the USB C tester only works with something connected to the output. USB C test function works as a "pass thru." Maybe this is common to USB C and I was unaware of it but with this tester you cannot simply plug into USB C and get a reading. Other than that I would highly recommend this.

Be prepared

I like this device, the one downside though that some users point out is that with just the USB C plugged into a device, it won't show any readings. There must be a load on the output side in order to have any readings for USB C. I don't know if that's just a function of. USB C architecture over USB A, but USB A input will power on the device and show USB A reading both with and without a load. Just know that in advance, and it's a nice little device. I love that I get current readings with a load attached, you don't see that on a lot of USB meters :)

Do you know how much electricity is being used by each of your electrical devices? If you are lik...

Do you know how much electricity is being used by each of your electrical devices? If you are like most people, you have absolutely no idea. But also like a lot of people, you are probably carrying an extra battery backup for your phone, tablet, or even laptop. But how long will a single charge last? A Watt Monitor is a small meter that will help you determine how much juice is being used by these devices. Let's look at it simply: If you have a 10000 mAh battery and are charging your devices at 5 volts (very typical for phones & tablets), your backup battery will provide you with 50 Wh of power. A typical iPhone at 50% battery will need about 15Wh to recharge fully. Meaning your 10k backup will recharge your phone about three times. Now, if your off-grid with one of ... MoreDo you know how much electricity is being used by each of your electrical devices? If you are like most people, you have absolutely no idea. But also like a lot of people, you are probably carrying an extra battery backup for your phone, tablet, or even laptop. But how long will a single charge last? A Watt Monitor is a small meter that will help you determine how much juice is being used by these devices. Let's look at it simply: If you have a 10000 mAh battery and are charging your devices at 5 volts (very typical for phones & tablets), your backup battery will provide you with 50 Wh of power. A typical iPhone at 50% battery will need about 15Wh to recharge fully. Meaning your 10k backup will recharge your phone about three times. Now, if your off-grid with one of the 250, 500, or 1000Wh solar generators, you now have an extremely simple way of know how long it will last and thus not spoil your weekend! The Kline Power Meter will help provide you all the information you need to set your mind at ease, knowing what to expect from your power sources. It's just that simple!

Gives reading that are impossible; 150mah for 3 AAA. Under multiple conditions... but so many inc...

Gives reading that are impossible; 150mah for 3 AAA. Under multiple conditions... but so many inconsistancies does suggest the meter tester is at fault of these readings. Like 0 ohms, 0 ma (under 50 reads as zero which is not completwly wrong but @ 5.3v oem charger runs at 2000ma fast charging.), also under various circumstances cables batteries and charger the time stamp freezes. Ive tested load and in all but 1 power brick ive sufficiemt amperage to run both devices. Will exhange through klein to double check these results. Thank you so far im very happy being able to have objective measurements since purchasing 5v products is vbecoming very popular, with unreliable quality creating a base line that everyone can see helps those who choose to see.

This is quite a nice tool, but it isn't without some key disadvantages to no name options. So the...

This is quite a nice tool, but it isn't without some key disadvantages to no name options. So the tool is simple, plug into charger then output using either USB-C or USB-A. Then the device will start to capture capacity voltage and current. The pros: Easy to use and simple operation. The ability to save data to the device. Offers USB-C and USB-A input/output. The cons: If your charger shuts off when low output is detected, the data is lost. This is probably the worst part about it since most chargers stop output under low current draw. Offers very basic information for the cost. Overall: It's a good name brand tester, and if you care about that stuff then this is the one for you. That being said, if you don't care about that then look at some of the alternatives out ... MoreThis is quite a nice tool, but it isn't without some key disadvantages to no name options. So the tool is simple, plug into charger then output using either USB-C or USB-A. Then the device will start to capture capacity voltage and current. The pros: Easy to use and simple operation. The ability to save data to the device. Offers USB-C and USB-A input/output. The cons: If your charger shuts off when low output is detected, the data is lost. This is probably the worst part about it since most chargers stop output under low current draw. Offers very basic information for the cost. Overall: It's a good name brand tester, and if you care about that stuff then this is the one for you. That being said, if you don't care about that then look at some of the alternatives out there. Most will keep their data on a power cycle and for that I lowered it 1 star. I use these to test portable chargers and I can only use these to test recharging of them since it doesn't keep data after full discharge. If I have any issues I'll update this review.

Very light and cheap feeling

This doesn't feel like most Klein meters and is quite light and cheap feeling.This only measures USB-C with a USB-C device plugged in; this is absolutely BS as it requires you to risk a USB-C device to test a USB-C outlet. The USB-A does show an initiating voltage without any device plugged in downstream.The biggest issue I have however is that this meter does not measure Watts; you must calculate instantaneous watts on the fly if you need them.Does measure: V, A, mAh, WHr, & Ohms

[Rewarded Review]

I am a computer guy, aka Chief Nerd, I have repaired, built and setup computers and networks since before DOS v1 (I still have a copy of DOS v1 in the shrink wrap). I had to submit my college labs on punch cards, so yes that far back working on computers.This is a simple one purpose tool that works beautiful.Does your PC keep losing its printer and other USB drivers? Does it take forever to charge your phone, this tool is how you solve those problems.Klein Tools ET920 is used to see what is happening with your USB port, charger. (the big plug type A or the smaller plug used on a lot of cell phones type C) It is a no brainer to operate, just plug one of the short leads into your source, (in the attached photo, I was using a surge protector type of power ... MoreI am a computer guy, aka Chief Nerd, I have repaired, built and setup computers and networks since before DOS v1 (I still have a copy of DOS v1 in the shrink wrap). I had to submit my college labs on punch cards, so yes that far back working on computers.This is a simple one purpose tool that works beautiful.Does your PC keep losing its printer and other USB drivers? Does it take forever to charge your phone, this tool is how you solve those problems.Klein Tools ET920 is used to see what is happening with your USB port, charger. (the big plug type A or the smaller plug used on a lot of cell phones type C) It is a no brainer to operate, just plug one of the short leads into your source, (in the attached photo, I was using a surge protector type of power strip).I am not going to give a lesson on USB limits etc. I just wanted to say this works like a charm. It easily gives out the info you need to know if you have an issue, and who is the culprit. (phone, laptop port, wall charger are the who I am referencing).The display is bright, and easy to read unless you are in direct sunlight, but it is kinda small (see photo, that is a quarter next to the display for perspective). To be fair most USB testers I have used or seen are the size of a flash drive so for this type of tool it is a giant.It is built well and easy to handle, and it comes from people who know their customer needs and wants, because they have been listening to generations of people who work in telecommunications, electrical and yes PCs.Who makes this, and how reliable are they, the paragraph below should give you that info (I borrowed it from their site with some of my horrible editing).Klein Tools has been crafting tools in America, Since 1857. Started by Mathias Klein it is still owned and operated by his fifth generation descendants. Klein Tools invest in U.S. manufacturing and is committed to maintaining its place as the favorite among electricians. Klein is the only major tool manufacturer worldwide focused on electrical and utility applications. No other manufacturer of hand tools and related products used in electrical applications makes more items in America than Klein Tools.

[Rewarded Review] I find USB multimeters to be valuable given the increasing pile of devices I have that use USB ch...

I find USB multimeters to be valuable given the increasing pile of devices I have that use USB charging. The multimeter can be used to tell of the charger is working OK, if the device is charging, how fast it's charging, when the device is done charging, and how much charge the device took. In addition this multimeter reports the elapsed charge time and charger resistance.This Klein ET920 has several improvements over other USB multimeters I've used. It displays volts, amps, milliamp-hours, watt-hours (amp-hours * voltage), and elapsed charge time all on one screen instead of having to push a tiny button to cycle through the readings. Measurements except for those in memory reset when the multimeter is disconnected. There are 10 memory locations to store readings ... MoreI find USB multimeters to be valuable given the increasing pile of devices I have that use USB charging. The multimeter can be used to tell of the charger is working OK, if the device is charging, how fast it's charging, when the device is done charging, and how much charge the device took. In addition this multimeter reports the elapsed charge time and charger resistance.This Klein ET920 has several improvements over other USB multimeters I've used. It displays volts, amps, milliamp-hours, watt-hours (amp-hours * voltage), and elapsed charge time all on one screen instead of having to push a tiny button to cycle through the readings. Measurements except for those in memory reset when the multimeter is disconnected. There are 10 memory locations to store readings in. The USB-C connection doesn't turn on the display unless a USB-C device is connected because the connected device is what determines the voltage for a USB-C charger.The large mode button changes between the default screen, which doesn't show watt-hours or resistance to the Enhanced screen that shows everything, including enlarging the font on the volts and amps. Further presses on the mode button cycle through the 10 memory locations. Pressing and holding the mode button puts the current readings into the next available memory location.The meter is 2" x 3" and the leads are 5" long.A note in the manual says that readings below 50 mA will show as zero. Since the normal charge rate for a USB port is 500-2400 mA, zero would indicate that charging was complete. It's made in China.

[Rewarded Review] This is a professional tool and absolute necessity when installing USB outlets that are gaining p...

This is a professional tool and absolute necessity when installing USB outlets that are gaining popularity.Most, if not all electronics are very sensitive to level of power, power fluctuations, resistance, power drop, microamperage settings and so on. With this multimeter you have it at the palm of your hand, just plug and see it all laid out.I tried it on installation of 5 outlets and it turned out that 3 were having issues, 2 power was fluctuating with power draw, one had connectivity issues and the other was dead-on-arrival.I'm glad that Klein thought about this and finally did this tool.It is very easy to use, sturdy case and body, top notch ABS plastic with 30% glass-fiber reinforcement, crisp and well lit display, thick insulation on the connecting ... MoreThis is a professional tool and absolute necessity when installing USB outlets that are gaining popularity.Most, if not all electronics are very sensitive to level of power, power fluctuations, resistance, power drop, microamperage settings and so on. With this multimeter you have it at the palm of your hand, just plug and see it all laid out.I tried it on installation of 5 outlets and it turned out that 3 were having issues, 2 power was fluctuating with power draw, one had connectivity issues and the other was dead-on-arrival.I'm glad that Klein thought about this and finally did this tool.It is very easy to use, sturdy case and body, top notch ABS plastic with 30% glass-fiber reinforcement, crisp and well lit display, thick insulation on the connecting cables.Water ingress insulation seems to have been done well, with a protective seal within the seam of the casing. I expected to find also rubber seals for the female connectors, I guess design didn't want to take the risk of having moisture being sealed off there.Instructions are very detailed and clear. A must have tool for every electrician, electronics repair and computer specialist.Lovely little tool. Another job done with outstanding quality by Klein.

[Rewarded Review] USB Digital Meter with USB-A and USB-C This is a great tool for diagnosing USB ports or getting i...

USB Digital Meter with USB-A and USB-CThis is a great tool for diagnosing USB ports or getting information on the amount of power your USB devices are using. The device comes with an instruction sheet that is well written and easy to understand. The tool is simple to use and provides all the necessary information. It requires no batteries, simply plug it into a powered USB port and it comes on. The display screen lights up bright and is very clear. There are three modes: a default screen, an enhanced screen and a memory mode, pressing the mode button rotates you thru them. You can store up to ten captures. Once you have plugged it into a powered USB port and the unit is on you can plug a USB device into the bottom of the tool and it will show you: volts, current ... MoreUSB Digital Meter with USB-A and USB-CThis is a great tool for diagnosing USB ports or getting information on the amount of power your USB devices are using. The device comes with an instruction sheet that is well written and easy to understand. The tool is simple to use and provides all the necessary information. It requires no batteries, simply plug it into a powered USB port and it comes on. The display screen lights up bright and is very clear. There are three modes: a default screen, an enhanced screen and a memory mode, pressing the mode button rotates you thru them. You can store up to ten captures. Once you have plugged it into a powered USB port and the unit is on you can plug a USB device into the bottom of the tool and it will show you: volts, current drawn, mah, watts and amount of time it has been monitoring. I tested this via a USB speaker and tablet, worked great and provided interesting data from each.I really like this tool.Pros:It’s a quality Klein ToolSmallEasy to useCons:None