Key Features Open, Non-In-Eardesign for safety, clarity & long wearingcomfort. Closed-cavity sound with Dual ENCmics noise cancellation for clear calls. Dual ModeAudio– Communication & HD Musicmodes. Multi-point Bluetooth Connection (Dual BT Device switching). Stable Connection: Lag-free wireless technology. Outdoor Clarity: Clear calls even in outdoor environments. Features Fast ChargingTechnology & Long-Lasting Battery >17hrs talk-time & >19hrsmusicmodes. Optional BT Dongle (USB-A).