Microphone unit: Φ4.15mm
SPL: -42±3dB S.P.L at 1Khz
Impedance: ≤2.2KΩ
Frequency response: 100Hz–10,000Hz
Directivity: Omni-directional
Speaker diameter: Φ40mm
Frequency response: 20Hz–20KHz
Impedance: 32Ω
SPL: 95±3dB S.P.L at 1KHz
Bluetooth version: CSR8645 V4.0
Support profile: HSP, HFP, A2DP, AVRCP, APTX
Transmission frequency: 2.40GHz–2.48GHz
Transmission distance: 33 ft (10 m)
Charging port: Micro USB 5V/1A
Standby time: More than 120 hours
Talking time: About 18 hours
Playing time: About 18 hours
Charging time: About 2 hours
Battery type: Built-in 500mah rechargeable lithium battery