1.AUTOMATIC SENSOR, OFF/AUTO 2 LIGHT MODES: This motion sensor closet light is auto-on within 10 ft, and auto-off after 15-20 seconds of no motion detected. It will turn on when motion is detected in the daytime (Ambient is dark enough) or at night. Also, you can choose to turn the light directly off. (There isn't an "on" switch, it's motion detected and light sensor.) Note: Do not put 2 lights too close. One light may cause the other not to light up if they are too close 2.USB RECHARGEABLE, MICRO USB CABLE INCLUDED: These under cabinet lights are powered by a built-in rechargeable 3.7V 600mAh battery. A Micro USB cable is included so that you can simply recharge it with any national standard USB charger, mobile phone charger, or your computer USB port 3.EASY TO INSTALL: The adhesive strip with magnetic fields is easily attached to and detachable from the lamp body. No tools, screws, or nuts are required. Mount the closet light on any clean and smooth area, and you're good to go 4.LONG PERFORMANCE: The 600mAh battery brightens your dark corners for 4 continuous hours on a single full charge. The standard recharging period is 3 months when it detects motion 5 - 8 times/day