1、SOFT AND LOW NOISE: The sleep speaker uses bone conduction technology to gently coax singing without hurting the ear, helping to reduce noise and fall asleep comfortably 2、SURROUND SOUND EFFECT: The bone conduction sleep speaker brings 3D surround sound effect, which help sleep through vibration. The sound quality is full and transparent, and the battery lasts long 3、WHITE NOISE SLEEP MUSIC: You can choose from white noise, stream sound, lullaby, bird song, meditation song, rain sound, waves sound, thunder sound. The sound effects can be switched at will to help you relax and fall asleep 4、STABLE AND PORTABLE: The bone conduction speaker supports BT connection for 5.3 seconds, stable signal transmission and fast, light and compact, easy to carry, no footprint 5、EASY TO OPERATE: Double click can adjust the timed shutdown time, easy to fall asleep with one key operating, sleep speaker is also a mobile phone stand Item Type: Bone Conduction Sleep Speaker Material: ABS Battery Type: Li ion battery Battery Capacity: 400mAh Usage Time: About 20h Rated Power: 3W Charging Interface: Type C Small Memory Card Slot: Support up to 32G small memory card(not included) Function: BT playback, small memory card(not included), timing shutdown, mobile phone stand 1 x BT Sleep Speaker 1 x Card Reader 1 x User Manual 1 x Charging Cable