Material: ABS Product Size: 3.5 * 7.0 * 26.5 cm Color: Black Power supply: Plug-in required, 5V 1A adapter recommended Package Included: 1 * LED Digital Clock, Date Temperature Alarm Clock 3.5 * 7.0 * 26.5 cm LED digital clock with mirror surface. The wall clock displays time, alarm, temperature, date, and supports 12/24 hour format. Large and bright digits, clear reading at long distances. Dual alarm with 40 melodies. 2 alarms can be set, each with independent switch. 40 different ringtones and 4 volume levels are available. This digital alarm clock can be used as a desk/night mirror, and also as a digital wall clock. It is compatible with living room, bedroom, office. USB-powered digital clock supports 6-level automatic brightness adjustment for different time periods. 6-level manual brightness adjustment is also supported, and the display can be turned off completely. The digital alarm clock needs to be connected to power source for operation. The length of the USB cable connected to the alarm clock is 135 cm (adapter not included). The alarm clock is equipped with built-in button battery, which saves clock settings in case of power outage. No need to reset settings after power is restored.