Wireless Motion Sensor: Remote transmission, 280 meters in the open place, suitable for more places, Home Security Alarm: Independent alarm horn,maximum 113dB, can effectively scare the thieves and intruders away, Power Supply: Receiver host using AA battery(not included) or micro USB power supply, infrared curtain using AAA battery(not included) or micro USB power supply, 5 Model Options: Welcome mode/ doorbell mode/ alarm mode/ color light mode/ night light mode, sufficiently meet your demand, Widely Application: Not only perfect for home security, but also for shops, hotels, offices and factories. Remote Control: Compatible remote control is available on our store, you can get one at "Special offers and product promotions" of this page. Item Type:Infrared Detector Alarm Model: MS-YBQ04 (2* Infrared Sensor + 1* Receiver) Power Supply Receiver host: 3*AA battery( Not included ) or micro USB, Infrared sensor: 3* AAA battery( Not included ) or micro USB, Frequency: 433MHz Transmission Distance: 280m(Open Area) PIR Sensor Angle: 100 degree(horizontal);15 degree(vertical) Sensor Range: 2~8m Volume: 4 level Brightness: 4 level Working Environment Temperature: -10°C~60°C Package List: 2* Infrared Sensor 1* Receiver 1* Bag of Mounting Screws 1* User Manual(English) Note: The AA battery for the receiver and the AAA battery for the PIR sensor is not included in the package.