Feature: 1. Sleep Aid: Built in bone conduction technology conducts music into the ear through vibration, providing you with immersive music enjoyment that helps you fall asleep quickly, bringing deep relaxation and quality sleep. 2. Wireless and Wear Free: Bluetooth connectivity allows you to connect your phone or other device to play music at any time, without cumbersome cables and traditional in ear headphones, which avoids discomfort caused by prolonged wear. 3. Stable Connection: The wireless speaker uses Bluetooth connection function, which can be effectively connected within 10 meters, low power consumption, zero delay, and more stable and clear sound. 4. Excellent Sound Quality: Mini sleep aid speakers with HI FI sound quality, 3D stereo surround sound, very clear and soothing to help you relax and fall asleep. 5. Multiscene: In addition to sleep, bone conduction sleep speaker can also be used for outdoor sports, leisure and entertainment occasions, so that you can enjoy music anytime and anywhere. Specification: Item Type: Bone Conduction Sleep SpeakerMaterial: Plastic Size: Approx. 15.5x3.6x1.2cm / 6.1x1.4x0.5in Battery Type: Lithium Battery 400mAh (included) Charging Time: 2 hours Bluetooth Distance: Approx. 10m / 32.8ft . Package List: 1 x Host1 x Instruction Manual 1 x USB Cable