BlueParrott S650-XT Headset - Stereo, Mono - Wireless - Bluetooth - 328.1 ft (100 m) - Over-the-head - Binaural - Ear-cup - Noise Canceling

BlueParrott S650-XT Headset - Mono, Stereo - Mini-phone (3.5mm) - Wired/Wireless - Bluetooth - 328.1 ft (100 m) - 32 Ohm - 20 Hz to 20 kHz - Over-the-ear - Binaural - Ear-cup - Noise Cancelling, Bi-directional Microphone - Noise Canceling

BlueParrott B650-XT Headset - Mono - Mini-phone (3.5mm) - Wired/Wireless - Bluetooth - 328.1 ft (100 m) - 32 Ohm - 20 Hz to 20 kHz - Over-the-ear - Monaural - Ear-cup - Noise Cancelling, Bi-directional Microphone - Noise Canceling