1、[180 Degree Projection] 180 degree adjustable projection (‑90degree to 90degree), easily read the time on the ceiling while lying in bed, also clearly see the time within 30ft of bedroom. 2 levels of projection brightness. Press "Projection" button to sort the projection view up and down 180 degree. 2、[3 Level Brightness Settings] Medium brightness, the alarm clock can meet all your needs day and night. You can manually adjust the brightness or set it to automatic mode. Adjust the brightness according to environment, protect your eyes at night, and save energy. 3、[Storage Function] Backup memory battery (included) keeps working properly and remembers original time, alarm, radio, repeat, no need to reset in the event of a power failure. 4、[How to Use] Just press the "PROJECT" button on the top of the projector clock to activate the PROJECT function. Press the 12hour and 24 hour button to change the time format according to your habits. 5、[Key Operation] The button is simple and intuitive, the projector clock is very easy to configure, no need to press or hold a button repeatedly. Very suitable for young people or the elderly. Widely used in bedrooms, children's rooms, study rooms, offices, etc. 1 x Clock1 x USB Cable1 x Manual1 x Battery Item Type: Digital ClockMaterial: ABSWeight: Approx. 192g / 6.8ozProduct Size: Approx. 19.3x 6.5x 3.2cm / 7.6x 2.6x 1.3inUSB Port: DC PortBattery: 1 x Button Battery, CR2032, 225mAh(Shipped with Supporting Battery)