Sound Control and Backlight function: Press the button LIGHT to turn the backlight on or off, or turn on the light lasting for 5 seconds by clapping your hands with in1 meter or tapping the desk, which is for the convenience of checking time at night. Time display: Time: ( 12 / 24 hours ) Date: ( 2000 - 2099 Years) Week: ( 7 different languages ) Temperature display: ( switch between Fahrenheit and Celsius ) colour: black Material: ABS Alarm / snooze function: Alarm can be set with 8 optional alarm music. Universal Time: Can display the universal time and 16 cities can be set to local time Timing: with a countdown clock ( within 24 hours), there will be alarm reminder ( about one minute ) Temperature range: 0 Celsius - 50 Celsius Celsius ( 32 Fahrenheit -122 Fahrenheit) Temperature accuracy: +/-1 Celsius Humidity range: 10~99% Humidity accuracy: +/-5% Power: 2XAAA(Not included) 12/24 H selection Dimension: 92X92X50MM Package includes: 2 x Temperature and Humidity Clock 2 x Instructions Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.