Bone conduction vibrator produces sound with full and transparent sound quality. 3D surround sound effects transmit music through vibration to improve sleepUse sleep-aiding brain waves to quickly improve your sleepinessWhite noise soothing sleep-aiding music, sound effects can be switched at willWireless Bluetooth 5.3 seconds to connect to enjoy a personal concert. Bluetooth 5.3 chip, stable and strong signal reception, faster connection, high-speed transmission and low latencyIt is a sleep Bluetooth speaker and a mobile phone holder. It is a multifunctional home item that can be used to enjoy music or watch TV shows. Free your hands and place your phoneBluetooth version:Ver.5.3Supported protocols: +BLETransmitting power: classII (-6dBm~+4dBm)Frequency (Hz): 2.40GHZ~2.48GHZBluetooth transmission distance: 15 metersCharging interface: Type-CInput current: DC5VBattery: 400mAhBattery life: 10-20 hoursCharging time: 2 hoursColour:WhiteMaterial:ABSPackage Contents:1 x Sleep Speaker1 x TF Card1 x Card Reader1 x Type-C Cable1 x Chinese and English instruction manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.