JBL by Harman Synchros E50 BT Red bluetooth headphone - up to 16 hours running time, PureBass performance and premium 50mm drivers, ear-cup-based microphone with echo-cancelation technology, ShareMe technology allows simultaneous, wireless music-listening among 2 ShareMe equipped headphoneson-ear, over-ear, 117 dB efficiency, frequency response: 20 - 20000 Hz, 30 mW maximum input, weight: 300 g, incl. 1 aux cable and 1 USB aux cable for charging, colour: red