Adaptive Noise Cancelling with Smart Ambient Adaptive Noise Cancelling means zero distractions when it's time to focus on your studies—or get your groove on. And if you want to hear the world around you without removing your headphones, Ambient Aware and TalkThru sharpen the sounds of your surroundings or voices. Easily activate these Ambient Sound Control modes through the JBL Headphones app. Bluetooth 5.3 with LE Audio (*) Wirelessly stream high-quality JBL Pure Bass Sound from your smartphone with the help of the latest Bluetooth technology. Optimize the Bluetooth performance with the Smart Audio & Video feature in the JBL Headphones app by selecting the Audio (for the best sound quality) or the Video (for an optimal gaming and video output) modes.(*) Available via OTA update at a later stage. JBL Pure Bass Sound JBL Tune 770NC headphones feature renowned JBL Pure Bass sound—the same that powers the most famous music venues all around the world. General Specifications Driver size (mm) 40 Number of Microphones 1 Audio Specifications Driver sensitivity at 1kHz/1mW (dB) 100 Dynamic frequency response range (Hz) 20 Hz – 20 kHz Impedance (ohms) 32 Dimensions Weight (g) 232 Control and Connection Specifications Bluetooth version 5.3 Bluetooth profiles A2DP v1.4, AVRCP v1.6.2, HFP v1.8 Bluetooth frequency 2.4 GHz – 2.4835 GHz Bluetooth transmitted modulation GFSK, π/4-DQPSK, 8DPSK Bluetooth transmitter power < 10 dBm (E.I.R.P) Battery Maximum talk time (hours) 39 Charging time (hours from empty) 2 Maximum music play time with ANC off (hours) 70 Maximum music play time with ANC on (hours) 44 Maximum play time (hours) 70 What's in The Box? 1 x JBL Tune 770NC headphones 1 x USB-C Charging Cable 1 x Detachable audio cable