Thank you for viewing this item. [Inspection before shipping] To avoid problems as much as possible, we inspect the lights before shipping. This is an indoor motion sensor light, 20cm in length. It illuminates brightly with LEDs. It is very useful for stairs, hallways, closets, etc. No batteries required Batteries are not needed as it is rechargeable. It is USB rechargeable. A short cable is included. Mode switching Constant on, Motion sensor, OFF It will be shipped in the OFF position. Installation method Attach to walls etc. with the included magnet and iron plate using tape. [For those concerned about misalignment] Attach the magnet to the main unit. Attach the iron plate to the magnet, peel off the paper from the tape on the iron plate, and press it against the wall. This will allow you to install it without the magnet and iron plate shifting. [Simple packaging] To keep prices down, the item will be shipped without its original box and in simple packaging. Please refrain from purchasing if you are concerned about this. Set contents [per unit] 20cm LED light, magnet and iron plate, USB cable We inspect before shipping, so if there is a malfunction during transport, please apply for compensation from the Yahoo Flea Market office. If there is an initial defect that the office cannot handle, we will respond, so please contact us. We also have other items for sale, such as longer 30cm lights and smaller sensor lights, so please take a look.