Bluetooth version: 5.0 + EDR
Impedance: 32 Ohm
Microphone sensitivity: 42 dB
Range: up to 6 meters (can extend if there is no obstacle, maxium 10 meter).
Earphone Battery capacity: 65 mAh
Charging box capacity:460 mAh
Charging time: about 1 hour
Duration: 2.5 to 4 hours (depend on your volume)
Standby: 60 hours
Languages: English & Chinese
Compatible with all iOS & Android mobile phones.