JBL by Harman Synchros E40 BT White bluetooth headphone - up to 16 hours running time, JBL signature sound with PureBass performance and premium 40mm drivers, ear-cup-based microphone with echo-cancelation technology, ShareMe technology allows simultaneous, wireless music-listening among 2 ShareMe equipped headphoneson-ear, on ear, 32 ohms rated impedance, 114 dB efficiency, frequency response: 20 - 22000 Hz, 30 mW maximum input, weight: 205 g, incl. 1 aux cable and 1 USB aux cable for charging, colour: white