JBL Live670nc Wireless On-Ear 40mm HeadPhones, ANC, Bluetooth, 1Y - Blue Driver sensitivity: 1kHz/1mW 97dB Dynamic frequency response range: 20Hz to 20kHz Impedance: 32 Ohms Charging Cable Length: 0.2m Charging time: 2hrs Maximum music play time with ANC off: 70hrs Maximum play time: 44hrs Features: Built-in Microphone; Adaptive Noise Cancelling; Ambient Aware; Hands Free Call; Multi-Point Connection; Supports Speed Charge Includes: 1x USB-C Charging Cable Warranty: 1 Year Official Warranty