This indoor stair light adopts a USB charging design, with a built-in 1800mAh rechargeable battery and a Class A lithium-polymer battery, which features high energy density and a long cycle life. On a full charge, it can last 9-10 hours in constant-on mode (at maximum brightness), and 50-70 days in auto mode (with 20-motion-activated illuminations per day, 25-seconds each time). Equipped with 38-LED lights, it achieves a brightness of 180 lumens and offers 3-color temperature options: warm white, natural white, and cool white within the range of 2700K-6000K. It supports remote control, allowing you to set 43-timing options (15/30/45/60 minutes) and adjust the brightness from 10% to 100%. The remote control has a range of 16 ft. and supports group control. The upgraded motion sensor function can detect human activities within a 10 ft. range at a 120° angle in dark environments. It automatically turns on when motion is detected and shuts off automatically after 25-seconds of inactivity. Installation is simple: it has a built-in strong magnet for direct adsorption on iron surfaces, or can be fixed at any position using the included adhesive metal sheet, making it easy to remove for charging. It is suitable for scenarios such as under kitchen counters, wardrobes, cabinets, basements, stairs, and corridors.