JBL by Harman Synchros S400BT Black bluetooth headphone - with touch sensor, JBL Professional Audio sound with PureBass Performance and aptX encoding, up to 16 hours running time (listening to music), bluetooth 3.0, PureBass performance and premium 40 mm drivers, on-ear design, 115 dB efficiency, frequency response: 20 - 20000 Hz, 30 mW maximum input, weight: 275 g, incl. 1 USB charging cable, 1 audio cable with 3,5 mm plug an dcarry case, colour: black