Description: 100% brand new and good quality. New Bluetooth 5.0 version Foldable, retractable and adjustable in length. Can be inserted into the card (TF card) without connecting the phone can also play music. Made of high-cost head leather earcups, comfortable to wear. Heavy bass + stereo sound = high quality headphones. 1. Driver: 40mm 2. Impedance: 32 OHM 3. Bluetooth version: Bluetooth v5.0 4.Bluetooth frequency band: 2.4GHz 5. Power level: CLASS II 7. Bluetooth distance: 10m without barriers 8. Frequency response: 20-20000Hz 11.With A2DP /AVRCP high quality stereo audio transmission and remote control protocol 12. Powerful noise cancellation circuit (active noise reduction) 14.Charging time approx. 2 hours (power indication charging: red light on, fully charged: red light off (blue light on) 17. Talk time approx. 8-10 hours 18. Music time approx. 8-10 hours 19. Standby time approx. 120 hours 21.Battery capacity 250MAH + protection plate 22. Charging power: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger). 23. Compatible with mobile phones: compatible with Android, Apple, Microsoft, Symbian system 99% of mobile phones with Bluetooth function. PackageIncludes: 1* radio bluetooth headset Note: 1. Due to manual measurement, there may be a slight tolerance of 1-3cm. 2. Due to difference between different monitors, the picture may not reflect the actual color of the item.