1、3 in 1 Function: Bluetooth, white noise, timing function, bluetooth playback mode and white noise playback mode can be switched at will to promote sleep. 5 timing optional, 30 minutes, 60 minutes, 120 minutes, 180 minutes, 240 minutes. Built in 20 white noise selections and 4 sleep aids music. 2、15 Hours Continuous Playing: Bluetooth V2 chip, ultra low power consumption, high battery life, 15 hours of continuous music playback, which is enough to support the whole night. For iOS system, can display battery power and activates smart voice app. 3、Unique 3D Contour Design: Designed based on ergonomics, bluetooth sleep headphones have wider and deeper eye space, which will not cause your eyeballs and face are under pressure and will not rub the eyelids. Moreover, breathable mesh fabric and ice silk lining can relieve facial pressure and help you fall asleep quickly. 4、Thoughtful Design: 5mm thick ultra thin earphone speaker, and wrapped with soft felt cloth, to ensure that the side of the ear does not pressure. Eyemask with zipper pocket, you can add a hot compress, cold compress ice pack, will have a completely different experience. 5、Adjustable Eyeshade: Block out light to make your sleep better, which make you fall asleep faster. The position of the earphone in the eyeshade is adjustable, and it has an elastic adjustment belt, which can be adapted to almost all head circumference. Earphones are detachable for easy eyemask cleaning. 1 x Bluetooth Sleep Eyeshade1 x Type C Charging Cable 1 x Instruction Manual1 x Storage Bag Item Type: Bluetooth Sleep EyeshadeMaterial: Ice Silk Cold ClothWeight: Approx. 162g / 5.7ozBattery Type: Polymer Lithium Battery (Shipped With Built In Battery)Battery Capacity: 400mahPower Supply Mode: Type C ChargingBluetooth Specifications: V 5.2, EDR, A2DP, AVRCP, HFP Frequency Range: 2.402GHz- 2.480GHzTransmission Distance: More Than 20 MetersSound Channel: StereoSpeaker Parameters: 32Ω 30mmSpeaker Power: 2 x 10 MilliwattsSignal To Noise Ratio: 104dB Functions: Previous Song, Next Song, Volume Up, Volume Down, Play, Pause, Answer Calls, Make Calls, Timing FunctionRunning Time: 15 HoursCharging Time: About 2-3 Hours