Features 1.[Bone Conduction Technology]: The portable pillow speaker adopts bone conduction technology, allowing vibration to be transmitted directly to your inner ear through the pillow. 2.[Bluetooth 5.0+EDR]: The bone conduction pillow speaker equipped with premium chip, ensuring sound stable and clear, built in rechargeable battery, charging time is only 1 hour, can work for more than 8 hours. 3.[Stereo Bass]: The bone conduction pillow speaker has stereo bass, soft whispering sound can help reduce stress and help you fall asleep faster, and other people around you will not hear the sound. 4.[Helping Deep Sleep]: The mini Bluetooth pillow speaker is designed to reduce stress and help with deep sleep, providing great help for adults and babies to fall asleep and get rid of insomnia troubles. 5.[Compact and Portable]: The bone conduction pillow speaker has small size and light weight, suitable for carrying when travel or business trip, will not take up too much space. specificationItem Type: Bone Conduction Bluetooth Pillow Speaker Material: ABS Color: Black Size: Approx. 123 x 38 x 15mm / 4.8 x 1.5 x 0.6in Bluetooth Version: V5.0+EDR Frequency Response Range: 80HZ to 18KHZ Charging Interface: Type C Output Power: 82W Support Sound Format: MP3, WMA, DMV Support: Memory Card (maximum 32GB) Playback Time: More than 8H Battery Type: 300mAh Lithium ion Battery (built in) PackageList1 x BoneConductionPillowSpeaker