Product Details; Bluetooth Headphone Wireless Headband Features: Bluetooth headband can keep your head warm, allows you to listen to your music without having to wear additional headphones, and protect you from being disturbed by your messy hair and sweat. Built-in microphone to let you won't miss any callings. This headband is better for sports, such as running, and yoga, not for sleeping. cause the speaker is a little thick to sleep. One size fits most and the Bluetooth headband is fully washable after removing the Bluetooth module from the back hole. Made from Nylon+Cotton and provide a soft and comfortable feeling. Built-in 200mAh high-performance battery, Charge via USB Cable. How to connect Bluetooth: 1. Clear the Bluetooth list in the phone 2. Long press the "on/off" button in the hat to red/blue light flash. 3. Enable your Bluetooth in the phone, find the Bluetooth name "BT-01", then connect it. Specifications: Bluetooth version: 4.1+EDR Transmission distance: 10m (33ft) Battery: Li-Ion 3.7V 160-180mAh Talk time: up to 3-5 hours Standby time: up to 24 hours Charging time: 2 hours Packing Included: 1 x Bluetooth headband 1 x USB Charging cable 1 x Instruction Manual