JBL Tune 670 Wireless On-Ear 32mm Headphones, ANC, Bluetooth, 1Y - Black Bluetooth version: 5.3 Driver size: 32mm Driver sensitivity: At 1kHz/1mW 98dB Dynamic frequency response range (Hz): 20 Hz – 20 kHz Charging time: 2hrs Maximum music play time with ANC off (hours): 70hrs Features: Foldable; Voice Assistant integration; Adaptive Noise Cancelling; Built-in Microphone; Detachable Cable; JBL Pure Bass Sound Warranty: 1 Year Official Warranty