Technical Specifications Driver size: 5.8mm Dynamic driver Frequency response: 20Hz – 20kHz Sensitivity: 96dB SPL @ 1kHz 1mW Maximum SPL: 96dB Microphone sensitivity: -38dBV/Pa @ 1kHz Impedance: 14 ohm Bluetooth transmitted power: <12dBm Bluetooth transmitted modulation: GFSK, π/4 DQPSK, 8DPSK Bluetooth frequency: 2.402GHz – 2.480GHz Bluetooth profile version: A2DP 1.3, AVRCP 1.5, HFP V1.7 Bluetooth version: 5.0 Headset battery type: Lithium-ion battery (85mAh/3.7V DC) Charging case battery type: Lithium-ion battery (850mAh/3.7V DC) Power supply: 5V 1.0A Charging time (headset & charging case): <2 hrs from empty Music playtime with BT on: 5 hrs Weight: 73g