The JBL Live 670NC headphones deliver JBL's powerful legendary sound in a convenient and stylish on-ear headset. When you get lost in the world of your music, True Adaptive Noise Canceling technology with Smart Ambient function keeps you away from distractions. Enjoy 65 hours (50 hours with BT+ANC on) of music and streaming, while 5 minutes of fast charging gives you four more hours. The JBL Live 670NC can connect to two Bluetooth devices at the same time.