BT1605 Head-mounted Foldable Stereo Bluetooth Wireless Headset Bluetooth 5.0 with Microphone 3.5mm Audio Jack Feature: 1. Foldable design for easily put into your bag, convenient for carrying, reliable to use. 2. Adjustable headband, suitable for most head size, meeting your different needs. 3. Designed with full-size protein leather earmuffs, soft and comfortable to wear. 4. Sealed earmuff design, effectively reducing the external noise interference. 5. Built-in 5.0 Bluetooth music chip, better music enjoyment, ideal choice for travel and home use. Specification: 1. Material: ABS 2. Color: Black 3. Headset Model: SY-BT1605 4. Bluetooth Version: 5.0 5. Transmission Distance: Approx. 10m33ft 6. Battery Using Time: 7-8 hours 7. Standby Time: 120 hours 8. Charging Time: 2 hours 9. Battery Capacity: DV5V200MAh rechargeable lithium battery 402030 10. Noise: 108db+-3dB 11. Maximum Power: 150mW 12. Frequency: 20 Hz-20 KHZ 13. Package List: Headset X1 User Manual X1 Connecting Cable X1 Wired Earphone X1 USB Cable X1