Specifications: The alarm clock is powered by for iPhone, for Android phone or other device. The display brightness can be automatically adjusted according to the use of ambient light, or set high, medium and low levels of brightness manually. It can set dual alarm clocks, and their snooze time. Battery can ensure the memory function when the external power is off. Item Name: Alarm Clock Material: Plastic, Metal Battery: 1 x CR2016 Battery (Included) Power Supply: Built-in Battery, USB Power: 5V, 2A Features: Digital Display, Dual USB Ports, Automatic Light Adjustment USB Cable Length: 200cm/78.74" (Approx.) Size: 15.8cm x 5.5cm x 8.7cm/6.22" x 2.17" x 3.43" (Approx.) Notes: You will find more amazing products if you visit our store. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package Includes: 1 x Alarm Clock 1 x USB Cable 1 x User Manual 1 x Battery