- Description Your music, noise free. When your music is on, nothing else matters. The JBL Tune 770NC Adaptive Noise Cancelling wireless headphones deliver on that promise all day—and longer, while sparing you the unwanted noises. With up to 70 hours of battery life, you’ll easily get through a busy week of using them and still have enough JBL Pure Bass Sound to get you through the weekend. And if you do need a quick recharge, 5 minutes gets you an extra 3 hours of music. Lightweight, and flat-folding, the JBL Tune 770NC can also connect with two Bluetooth® devices simultaneously, so you’ll never miss a call while watching a movie on your tablet. With the free JBL Headphones app, you can tailor the sound to suit your taste. And voice prompts in your language will guide you through the features. Manage your calls and your voice assistant hassle-free right from your phone and use VoiceAware to hear yourself when you’re speaking. Just choose the color that best suits your vibe, and start having fun. General Specifications Driver size (mm) : 40Number of Microphones: 1Control and Connection Specifications Bluetooth profiles: A2DP v1.4, AVRCP v1.6.2, HFP v1.8Bluetooth frequency: 2.4 GHz – 2.4835 GHzBluetooth transmitted modulation: GFSK, π/4-DQPSK, 8DPSKBluetooth transmitter power: < 10 dBm (E.I.R.P)Bluetooth version: 5.3Battery Charging time (hours from empty): 2Maximum music play time with ANC off (hours): 70Maximum music play time with ANC on (hours): 44Maximum play time (hours): 70Maximum talk time (hours): 39What's in The Box? 1 x JBL Tune 770NC headphones 1 x USB-C Charging Cable 1 x Detachable audio cable 1 x Warranty/Warning 1 x QSG