Technical Specifications • Driver size: 5.6mm • Frequency response: 10 Hz – 20 kHz • Impedance: 17Ω • Sensitivity: 97 dBSPL@1 kHz/1mW • Microphone sensitivity: -6 dBV@1kHz/Pa • Transmit frequency range: 100 Hz – 8 kHz • Bluetooth transmitted power: < 13 dBm • Bluetooth transmitted modulation: GFSK, π/4 DQPSK, 8DPSK • Bluetooth frequency range: 2.402 GHz – 2.480 GHz • Bluetooth profile version: A2DP 1.3, AVRCP 1.5, HFP 1.6 • Bluetooth version: 5.0 • Headset battery type: Coin cell battery (55 mA / 3.7 V) • Charging case battery type: Li-ion polymer battery (450 mA / 3.7 V) • Power supply: 5 V == 1 A • Charging time: < 2 hrs from empty • Music playtime with BT on: up to 6 hrs • Total music playtime with charging case: up to 20 hrs • Earpieces: 7.3 g / pc (14.6 g combined) • Charging case: 59.2 g