Works with computers via USB-A or USB-C, and with smartphones via Bluetooth®. Connect wirelessly to computers via the included BT600 adapter. Compatible with both Windows and Mac. IP64 dust- and water-resistant. Three microphone steerable array. Microphone pickup range up to 7 ft. Ideal for room sizes up to 4 m x 4 m. Microphone Frequency Response 100 Hz to 6.7 kHz. Full duplex audio. Noise and echo reduction. Loudspeakers 1 x 40 mm high-performance music speaker. Loudspeaker frequency response 80 Hz to 20 kHz. Bass reflex with dual passive radiators. Lithium-ion battery. 3200 mAH capacity. Up to 20 hours of talking time. Charging time of 4 hours. 28 in cable length. Touch sensitive controls for - Call/answer, end, mute, volume +/-. Programmable function button. Push button user controls for power on/off and bluetooth pairing. One USB-A port for smartphone charging. Included : Carry case. Lanyard. BT600 USB Bluetooth adapter. 1.3 x 3.7 x 7.2 in. Sold by each.