Digital LED Display Alarm Clock USB & Battery Operated Mirror Face Design This is a great digital clock with mirror function. It can display time in 12H/24H hour format and indoor temperature in °C/°F. The LED luminance is adjusted: dim and bright. Features: Large LED display for clear reading, time & temperature switch display. °C / °F mode & 12-hour / 24-hour mode switchable. Mirror face design, can be used as a small mirror. Indoor thermometer function, temperature range: 0°C~50°C(32°F~122°F). Night mode function: the LED display will automatically dim the luminance during the night time. With alarm and snooze function. Press \UP\ key to adjust the LED brightness(2 levels). 2 Power Supply: powered by USB cable(included) or 3 * AAA batteries(not included). Specifications: Material: ABS shell Display Color: White / Blue / Green / Red (Optional) Temperature Range: 0°C~50°C / 32°F~122°F Hour Format: 12H / 24H Night Mode Setting: Default Period 18:00-06:00 Power Supply: 3 * AAA batteries(not included) or DC 5V Product Size: 138 * 55 * 34mm / 5.4 * 2.16 * 1.34in Product Weight: 101g / 3.56oz Package Size: 14.5 * 7.5 * 4.3cm / 5.7 * 2.95 * 1.7in Package Weight: 145g / 5.11oz Note: 1. When powered by 3*AAA batteries(not included), press SNZ/LIGHT button, the LED will light on for 5s. 2. When plugged with USB cable, the LED light will be on always. Package List: 1 * LED Mirror Clock 1 * USB Cable 1 * User Manual(English)