Projection :1. Power On/Off: Press the "Up/Projection" key to activate the projection mode, and press the "Up/Projection" key a third time to turn off the projection.2. Change Brightness: There are 3 brightness levels: Bright, Bright and Off. When Projection Mode is on, press Up/Projection again to change the brightness. The default light is Light.3: Change the projection angle: Press "Up/Projection" to change the viewing angle, and the projected image rotates 180°. You can also rotate around the projection rod (on the right side of the projection) to change the angle.Main button description:1. Setting button: Time setting, then click "Up" or "Down" to select the hour.2. Press the "at 1.2" button: Alarm Settings, then tap "Up" or "Down" to select the alarm time/alarm sound.3. "Zz" button: Brightness adjustment.4. Down button: In time mode, press and hold to change temperature units.5. Up key: In the "Time" mode, press the "Up" key to change the screen color.1. "Up/Projection" button: Turn on projection. Press again to change projection brightness.6. "Radio/Sleep" button: Turn on the radio and click "Up" or "Down" to change FM.notes:1. Projection mode only works on AC power, not on batteries.2. The alarm storage function can be used in battery mode. When using AC power, you must reset the time and sound the alarm.3. The optimal projection distance is about 6.6-9.8 feet. This can be caused by either being too far away or too close.Specification:Name: three-color projection radioModel: TS5210USB output: 5100mAProduct weight: about 200gDC power supply: 5VPacking weight: about 269gTemperature range: 0-50°CSize: about 18.5*7.5*2.5cm/7.28*2.95*0.98inHumidity range: 20%-90%Humidity error range: ±5%Packing size: about 22*11.2*5cm/8.66*4.41*1.97inTemperature error range: ±2°CPacking list:1* Projection Alarm Clock