Description: Adjustable brightness: The alarm clock has high, medium, slight brightness and off. It can also set the automatic photosensitive function. Memory battery: Alarm clock has a built-in 2032 button battery. The external power failure keeps the product setting unchanged to avoid external power failure reset. Radio function: The alarm clock has the functions of automatic station search, station locking and station storage, 76-108mhz. Dual settings: The alarm clock meets the time reminder of different scenes and sleeps infinitely. The alarm can be set 1-2-4 - continuous dripping sound and radio. Easy to use: The alarm clock has LED digital display, the radio can be set to 5-90 minutes of automatic sleep. Specification: Material: ABS. USB input: DC 5V. Light color: Blue, white Radio frequency: 76-108 MHz. Projection distance: 0.5-5m. Volume adjustment: 0-15 level . Hour format: 12h / 24h. Brightness adjustment: 4 Level. Battery: 1 x CR2032 (including). Temperature display: Celsius and for Fahrenheit can be switched, 0-50 degrees, 32-122 degrees. The error is 1%. Humidity display: Humidity measurement range 20% - 99%, error 5%. Brightness adjustable: 100% brightness, 75% brightness, off. Rotation function: 180 degree. HD Projection distance: 2-5m/6.56-16.4ft (the best distance is 3 meters/9.8 ft.) The projection function works when USB is connected to the power supply. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: 1 Piece Alarm Clock(with 1 Piece Instruction, 1 Piece USB Cable).