specification:Alarm clock size: about 9*9*10.5CMWeight: about 0.188KGUse 3 AAA carbon batteries or DC5V or USB5V for power supply5 kinds of music alarm, built-in loudspeaker, the sound is clear and the volume is suitable. Time 12/24 hour system can be switched, temperature display Fahrenheit / Celsius switch. With blue or green backlight. It supports 24-hour all-day voice reporting of temperature, supports 15-hour intelligent voice reporting of temperature, supports a set of music alarms, and supports snooze function at intervals of 10 minutes. Timekeeping, snooze, and alarm support one-key switch, which is very convenient. The projection is clear and the sound is loud.Projection Clock Description1) mooe is the function key, press it to adjust the time, hr to adjust the time, min to adjust the minute Press 2 times to adjust the alarm Press 3 times to adjust Hourly time chime option (hr) Alarm 24/15 Startup options (min)2) In normal state, press hr to adjust the 12/24 hour display switch3) Long press the hr key and press the min key at the same time to switch the display of Fahrenheit/CelsiusWhen the projection clock is 2 meters away from the receiving wall or ceiling, the height of the projected font is about 20 cmWhen the projection clock is 6 meters away from the receiving wall or ceiling, the height of the projected font is about 60 cmPacking qty:1pcs