Features: LED time (adjustable 12/24 hour system), centigrade date and temperature and Fahrenheit temperature display. Three brightness adjustment modes, the brightness can be adjusted be set automatically or manually. Alarm function and snooze function, the alarm sound is a beep which lasts for about 1 minute, during the alarming time, the beep gets weaker gradually. The repeat time is 5 minutes by default. USB charging, external power-off protection function, convenient and practical. You can place it on your table, desk or ;hang on the wall of your home and office. Black and white outer shell, display colors white, red, green, blue, pink, orange for you to choose. Features: Material: plastic Case color: black Light color: white, red, green, blue, pink, orange (optional)< br/> Screen type: LED Display type: digital Power supply: USB 5V 1A Battery: one button battery (included) Size of Item: 21.5 * 8.5 * 1.7 cm / 8.5 * 3.3 * 0.7 inch Package size: 29 * 10 * 4.5 cm / 11.4 * 3.9 * 1.8 inch Item Weight: 234g / 8.3 oz Package Weight: 248g / 8.7 oz Package list: 1 * digital clock 1 * USB cable 1 * user manual