Feature:1. Innovative Bone Conduction Technology: This wireless BT speaker utilizes advanced bone conduction technology to deliver stereo sound directly through your pillow, without the need for traditional earphones. This means no more ear discomfort from prolonged use, and a more comfortable, unobtrusive listening experience.2. Dual Connection Modes: Our bone conduction speaker offers two connection modes for your convenience. It features a BT 5.3 mode with an imported BT chip for faster, more stable connections, and a TF mode that allows you to play music files directly from a memory card (not included).3. Long Battery Life: With a built-in 300mAh battery, this portable speaker can run continuously for up to 8 hours on a full charge, providing you with a seamless and enjoyable music experience. It's easily rechargeable via USB, making it perfect for use at home or on the go.4. Easy to Use: Simply long press to turn on the speaker, wait for it to pair with your BT device, and start playing your favorite tunes. The speaker will automatically connect to your phone for future use, making it incredibly user-friendly.5. Designed for Sleep: Specifically designed to be placed under your pillow, this BT sleep sound is the ideal choice for side sleepers. Experience the benefits of our sleep aid sound, designed to promote deeper, more peaceful sleep through bone conduction stereo sound and soothing white noise.Specification:Charging Voltage: 5V/200mAWorking Voltage: 3.7/4.2VBattery Capacity: 300mAhBT Version: 5.3BT Distance: 10m/32.8ftCharging Time: 2 hoursPlay Time: 8 hoursProtocol: A2DP, AVRCP, HSP, HFPProduct Color: Blue, Black (optional)Product Size: 15.5 * 3.6 * 1.2cm/6.1 * 1.4 * 0.8inchPackage List:1 * Bone Conduction Pillow Speaker1 * Type-C Charging Cable1 * Instructions