Microphone
Microphone Unit: Φ6.0 x 5mm
Directivity: Omni-directional
S.P.L: -58±2dB
Impedance: ≤2.2kΩ
Frequency Response: 100Hz-10KHz
Speaker
Speaker Diameter: Φ40mm
Impedance: 32Ω
S.P.L: 90±3dB
Frequency Response: 20-20KHz
Rated power: 20mW
Bluetooth
Bluetooth Version: V4.0+EDR
Support Profile: HSF/HFP/A2DP/AVRCP
Transmission Frequency: 2.4GHz-2.48GHz
Transmission Distance: 33ft/10m
Battery
Battery Type: Built-in 400mAh rechargeable lithium battery
Charging Port: Micro USB
Standby Time: About 250 hours
Talking Time: About 20 hours
Playing Time: About 20 hours
Charging Time: About 2-3 hours