Over-ear DJ headphones with Bluetooth. Bluetooth Specification Class 2, Maximum communication distance Prospective distance approx. 10ｍ*3, Supported Bluetooth profiles A2DP, AVRCP, HSP, HFP, Supported codecs SBC, AAC, Qualcomm® aptX™, Qualcomm® aptX™, Low Latency Play time Approx. 20 Hours, Charging time Approx 3 Hours, Type Closed, Dynamic Frequency response 5 Hz – 30 kHz, Input impedance 32 kΩ, Sensitivity 104 dB, Maximum input power 2,000 mW,Driver diameter 40 mm, Connection cord 1,2 m coiled cable (extended length 1,8 m), Weight 319 g (without cable). Accessories 6.3 mm stereo plug adapter(threaded type), USB charging cable .