Projection function: This alarm clock has projection and nearly 180 degree free rotation, the time and temperature on the display are easy to read from any angle Dual alarm clock with snooze function: Set two independent alarm clocks for different purposes. Press the top button to mute the alarm and extend the sleep time by five minutes Multi-information display: The multi-function alarm clock displays the following functions: time (12/24 format), date, day of the week, dual clock, temperature (C or F), humidity USB port or battery power: The alarm clock can be powered by 2 AAA batteries (not included).[Backlight] Touch the top of the watch to turn on the backlight and projection for 8 seconds. 4-level backlight is optional, with power supply. You can use a battery to power it, this projection alarm clock is very suitable for outdoor travel Product description Color name: Silver Technical data: Dimensions: approximately 14.5 cm x 9.5 cm x 5 cm. Weight: about 300 grams. Time format: 12/24 hours. Temperature: -9C to +50C / 15F to 122F. Resolution: 1C/F. Humidity: 20%-95% Resolution: 1%. Nap: 5 minutes Power supply: USB or 2 AAA batteries (not included). Function: Indoor temperature and humidity display projection alarm clock There are 7 language selection calendars. Temperature and time projection and on/off button. 2 Alarm clock and snooze function. Long press the TIME button to set the time. The 4-level backlight can be optionally equipped with a power supply. Box content: 1 x projection alarm clock 1 x USB cable. 1 x EN User Manual