<br><b>Bluetooth headband sleeping headphone design:</b> <br>Bluetooth headband sleeping headphone combines fashion and technology, dressy and sporty design. Stable bluetooth connection, ultra-low power, safe RF emissions, block out ambient noise without using earplugs that are painful and fall out. Also helps with insomnia, relaxation, meditation, travel and more. Suitable for shift workers, tinnitus sufferers, and people who share a bed with a snorer. <br> <br><b>Specification:</b> <br>Bluetooth version: V 5.0 and EDR <br>Wireless operation range: about 45 feet <br>Frequency: 2.402 Ghz- 2.480 GHz <br>Rechargeable Li-ion battery: 3.7 V/ 180 mAh <br>Charging time: 2 hours <br>Music playing time: up to 10 hours <br>Standby time: up to 72 hours <br> <br><b>Charging guide:</b> <br>1. Connect the micro USB cable to charger (or computer USB port) to bluetooth headband port. <br>2. Our device has a LED indication on the right, RED light means charging, BLUE when fully charged. <br> <br><b>How to connect bluetooth:</b> <br>1. Make sure that our device is charged before trying to connect. <br>2. Long press the \"ON/OFF\" button to red/ blue light flash. <br>3. Find \"Bluetooth Headband\" connect and enjoying. <br> <br><b>How to wash bluetooth headband:</b> <br>1. Push bluetooth control panel out of its pocket. <br>2. Pull the 2 ultra thin speakers out of its pocket. <br>3. Pull speakers and bluetooth panel out from separated stitching of the sleep mask. <br>4. Hand wash available. <br> <br>Note: <br>Please move the position of the speakers to align the ears to hear more clearly when use. <br>The mention of bluetooth and any related models above is only for purposes of demonstrating compatibility.