Feature:1. Bone Conduction Technology: The under pillow sleep speaker utilises bone conduction technology, which is comfortable and secure, and does not need to be inserted into the ear, making it more suitable for sleep.2. White Noise Function: The bone conduction sleep pillow is equipped with a white noise function, which effectively reduces ambient noise and creates a peaceful sleep environment. Enjoy premium music playback at your convenience.3. Built in BT Module: Bone conduction sleeping speaker has a built in BT module, which supports wireless connection to mobile phones, tablets and other devices, convenient for operating.4. Sleep Assist: The sleep assist function of the bone conduction sound machine can play soft music and meditation audio to help you fall asleep. Under pillow sound machine is cleverly designed to fit under your pillow, allowing you to enjoy great music while you sleep.5. Portable and Lightweight: The under pillow sleep sound machine is portable and lightweight, suitable for home, office, travelling and other scenarios. The convenience and comfort of under pillow audio technology allows you to relax to relaxing tunes.Specification:Item Type: Sleep SpeakerMaterial: PlasticSize: Approx. 15.5x3.6x1.2cm / 6.10x1.42x0.47inBattery Type: Battery 300mah (Built in battery for shipment)Charging Time: 2 hoursPlayback Time: 8 hoursNot shipping with Memory card.Package List:1 x Sleep Bone Conduction Pillow Speaker1 x User Manual1 x USB Cable