Looking to improve your sleep and make your mornings more energetic? The Elliptical Sunrise Alarm Clock simulation provides a gentle wake-up call by emitting an increasing amount of light. As well, the sunset feature dims light as we relax and drift off to sleep. The alarm can be set with 5 natural sounds or FM radio. Specifications: Power supply mode: USB power supply / dry battery AAA*2pc (not included) or optional power supply Material: ABS+PC Size: diameter 165*165*70mm Color: White ; Wood (Only the back of the Alarm Clock) Plug type: US, EU,JP Note: Lighting time: 10-60 min for Waking up; 10-120 min for Falling asleep. Package Contents: 1 x Alarm Clock Light. 1 x 1.2m USB Cable. 1 x Power Supply. 1 x User Manual.