Warning This product contains a button/coin battery and is hazardous. Keep batteries away from children. Batteries can cause severe or fatal injuries in 2 hours or less if swallowed or placed inside any part of the body. Medical attention should be sought immediately if it is suspected the battery has been swallowed or placed inside any part of the body.1080p Full HD resolution captures a great quality image day & night. Know what’s happening sooner with a heat-activated PIR motion sensor backed up with analytics for more accurate recordings & fewer false triggers. Spotlights on every camera help deter crime & allows for colour video at night up to 10m away. Each camera features a microphone so that you can capture audio alongside your video. Free recording to the 4 channel DVR’s 64GB micro SD Card storage. You can also add an external USB Hard Drive if you want more storage. Coax cables run between the DVR & each camera to create an ultra-reliable wired system that can't be interrupted.