Product Specifications: Material: Wood + Acrylic Size: 6.2 x 3.8 x 0.9 in Weight: Approx. 400g Power Supply: 1000 mA lithium battery;mains powered by USB adapter Package Included: 1 LED clock, 1 USB cable, 1 metal bar, manual Purpose: Used for office decoration, living room and bedroom decoration Caution: Please use in a dry environment. Please avoid using it for a long time in the place of vibration, high temperature and drastic temperature change. During use, please be careful not to electrocute or fall down. When using battery power, if the LED screen flickers or becomes dark, it is a sign of insufficient power. The color may vary depending on the customer's monitor settings, computer model and indoor environment. This product does not include a power plug, you can use all standard AC power plugs.