Wireless Bluetooth Earphones Sports Neck Hang Headphones

Specification:1. Bluetooth version: V4.22. Bluetooth distance: 10 meters3. Frequency range: 2.4GHz-2.48GHz4. Operating distance: Up to 10m (free space)5. Bluetooth profiles: A2DP, AVRCP, HSP, HFP6. Standby time: Up to 50hrs7. Working Voltage: DC5V/130MA8. Charging: USB cable included (no adaptor)9. Battery: Built in lithium polymer battery10.Talk/music playtime: Approximately 2-4 hours11. Charging time: Approximately 1-2 hours12. Frequency response: 20Hz-20kHz13. Operational temperature: -10 to 50°CPackage Contents：1* Wireless earphones1* USB Charging cable
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a