Feature 1、Large Screen LED Display: The brightness can be adjusted manually. The adjustment levels are off, slightly bright, medium bright and bright, and also can be adjusted automatically by light sensing. When this function is enabled, the product will automatically adjust the display brightness according to the ambient brightness. 2、Built in 2032 Button Battery: The projection alarm clock is equipped with a 2032 button battery. After the external power supply is powered off, the product setting and time can be kept unchanged, without repeated setting after power failure. 3、Set Automatic Shutdown Time: The radio can be set to turn off automatically for 5‑90 minutes. The radio can be turned off automatically according to the setting. 4、Good Features: LED digital alarm clock has high definition projection, can rotate 180 degrees, and the effective distance is 5 meters. 5、Alarm Clock Mode: The alarm clock mode can set the traditional drip alarm and set the radio as the alarm bell. Item Type: LED Digital Projection Alarm Clock Product Material: ABS Color: As Pictures Shown Weight: Approx. 274g / 9.7oz Battery Type: Button Battery (Shipped with Built in Battery) Battery Model: 2032 Battery Capacity: 200mAh Number of Batteries: 1 Package List 1 x Projection Alarm Clock 1 x English Manual 1 x USB Cable