1. Brightness : high, medium and low can adjust or automatic adjust 2. Power Supply: 5V / 2A input or CR2016 button battery (included) 3. Supports 2 USB outputs, snooze, memory function 4. Size: 15.8*5.5*8.7cm 5. Time Display : 12 / 24 6. Package Include - LED alarm clock x 1 - Charging cable x 1 - User manual x 1