This rechargeable digital clock features an auto backlight. It can be charged via a solar panel on the back or through USB. If the battery runs out, it will operate using a button cell battery. It has no unsightly power cord, allowing for a clean installation. The backlight can be switched between blue and orange. It automatically illuminates when vibration is detected at night and turns off after a period of inactivity. Made in China. Functionality has been confirmed as a precaution. Please note that the packaging may be damaged. Size: 8cm x 3cm x 3.5cm Weight: 55g