Features: 1. The turban is made of high-quality polyester fabric, which has good elasticity and excellent breathability. washable. Please remove the device module before thoroughly cleaning the headband. 2. The device module is located in the middle of the speaker and will not oppress the ears. The ultra-thin flat earphone speaker is comfortable to wear when lying down or sleeping on the side. They can block ambient noise without the need for earplugs that can cause pain and fall. 3. The wireless headband can be paired with any smart phone or tablet device with Bluetooth function more quickly and easily. 4. Sleep headset and sports headband in one: The sports headband allows you to listen to music without wearing additional headphones, and protects you from messy hair and sweat. 5. Very suitable for gym, exercise, running, yoga and other outdoor activities. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Headscarf material: polyester Channel: bilateral stereo Size: 27cm*10*2cm Bluetooth technical parameters: Bluetooth version: 5.0 Bluetooth transmission distance: 10~15 meters Headphone channel: stereo (2.0) Music playback time: maximum sound 7H, medium volume 10 hours Microphone distance: 1 meter Bluetooth standby time: 72H Battery capacity: 150ma/h Battery power: 0.55W Speaker impedance: 32 ohms Speaker power: 0.02W Frequency range: 2.4-2.4835GHz Sensitivity: 45db Transmitting power: 6dB Audio output distortion: 0.6% Audio output signal-to-noise ratio: 93dB Charging time: 1-2 hours Maximum input voltage: DC 5V Maximum input current: 150mah Maximum input power: 0.55W