JBL Tune 670NC Bluetooth Headphones

Power supply: 5 V 1 A
Frequency response: 20 Hz – 20 kHz
Impedance: 32 ohm
Sensitivity: 98 dB SPL@1 kHz
Maximum SPL: 95 dB
Microphone sensitivity: -40 dBV/Pa@1 kHz
Maximum operation temperature: 45 °C
Bluetooth transmitter modulation: GFSK, π/4-DQPSK, 8DPSK
Bluetooth version: 5.3
Bluetooth profile version: A2DP v1.4, AVRCP v1.6.2, HFP v1.8
Bluetooth transmitter frequency range: 2.4 GHz – 2.4835 GHz
Bluetooth transmitter power: < 10 dBm (E.I.R.P)
Driver size: 32 mm/1.25" Dynamic Driver
Weight: 174 g/0.384 lbs
Battery type: Lithium-ion battery (690 mAh/3.7V)
Charging time: 2 hrs
Music playtime with BT on: up to 70 hrs
Music playtime with BT on and ANC off: Up to 70 hrs
Music playtime with BT on and ANC on: Up to 44 hrs
Music playtime with AUX and ANC on: Up to 30 hrs
Talk time with ANC on: Up to 30 hrs
Talk time with ANC off: Up to 39 hrs