Description: Compared to other similar products on the market, our LED lamp adopts smart motion sensor design, which can be auto-on when detected human motion, and auto-off after a few seconds if no motion detected. Great for various kinds of occasions. Our motion sensor LED light built-in magnet, which is easy to install. And more, you can remove it to charge easily without a tool. You can stick it on the metal surface easily. It is constructed of aluminum alloy material. There are 3 different sizes for you to choose from. This product is perfectly suitable for home, household, bedroom, dorm, etc. Item Name: LED Light Material: Aluminum Alloy Voltage: 36V Lifetime: 25000h Light Source Power: LED Battery Capacity: Size 20cm/30cm: 800mAH Size 40cm: 1600mAH Power: Size 20cm/30cm: 0.65W Size 40cm: 0.85W Induction Battery Life: 60 Days Always-on Battery Life: 7 Hours Charging time: 4 Hours Size Details: 30 cm, LxWxH: 30cm x 3.9cm x 0.9cm/11.81" x 1.54" x 0.35"(Approx.) 20 cm, LxWxH: 20cm x 3.9cm x 0.9cm/7.87" x 1.54" x 0.35"(Approx.) 40cm, LxWxH: 40cm x 3.9cm x 0.9cm/15.75" x 1.54" x 0.35"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x LED Light 1 x USB Cable