Wireless Headphones - with microphone, headset, ear, closed construction, Bluetooth with dongle connection, USB-C, for PC, supports AAC and SBC, active noise control (ANC), taking calls, with volume control, frequency range: 20 Hz-20000 Hz, sensitivity: 84 dB/mW, impedance: 16 Ohm, converter: 40mm, removable cord length of 1,2m, battery life of up to 36 hr(s)