Features: 1.It's the time for Bluetooth 5.0,the compatibility and the stability, have been improved several times than old Bluetooth version. 2.Can automatically Pair, Power on after taking out from the charging case. 3.Wireless stereo, left and right channel separation,both ear can be used separately. Headset parameters 1.Wireless Version :V5.0+EDR 2. Driver: 8mm 3. Impedance: 32 OHM 4. Bluetooth use band: 2.4GHz 5. Power level: CLASS II 6. Output power: 22mW 7. Bluetooth distance: 10 meters barrier 8. Frequency response: 20-20000Hz 9. Operating voltage range: 3.0V-4.2V 10. Talk time is about 4-6 hours 11. music time about 4-6 hours 12. Standby time is about 110 hours Package List 2 x mini Bluetooth Headphones(left and right earphones,can be used separately) 1 x Charging case 1 x USB Charging Cable 1 x User Manual 2 pairs Free extra ear cap