Price Match Guarantee JBL Live 770NC Wireless Over-Ear Noise Cancelling Headphones JBL Live 770NC headphones deliver powerful JBL Signature Sound in a comfortable over-ear headband style. True Adaptive Noise Cancelling with Smart Ambient technology lets you decide which sounds to keep out and let in. Access your preferred voice assistant with either a hotword or an easy tap on the earcup. You'll enjoy 65 hours (50 hours with BT+ANC on) of music streaming, and a quick 5-minute speed charge gives