Mono headset. Wireless. Bluetooth 5.0 connectivity. Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Phonebook Access Profile (PBAP), Secure Simple Pairing (SSP2). NFC. Compatible with Mac and Windows. Additional Functions: DSP. Moisture-resistant. Max Operating Distance: 246 ft. Headphones Form: Earbud, over-the-ear mount. Frequency Response: 100 - 20000 Hz. Impedance: 16 Ohm. Diaphragm: 0.5 in. Volume Limiting Function. Features SoundGuard Technology and voice alerts. Omni-directional microphone boom. Active Noise Canceling. Mute, volume, answer/end, play/pause, next/previous track, reject call and redial controls. Connector Type: USB (4 pin USB Type A). Base station and charging cable (USB) included. Headset battery rechargeable - lithium ion. Capacity: 122 mAh. Up to 7 hour(s) of run time. Recharge Time of 1.5 hour(s). 0.71 oz. 1-year limited warranty. Sold by each. Black.