. PN: 981-001275 DIMENSIONS Width 176 mm Depth 95 mm Height 189 mm Weight 345 g Charging cable length 1.8 m TECHNICAL SPECIFICATIONS HEADPHONE Driver Graphene 50 mm Magnet Neodymium Frequency Response 20 Hz-20 KHz Impedance 38 Ohms Sensitivity 87.8 dB SPL @ 1 mW & 1 cm MATERIALS Fork Aluminum Headband Steel Ear and head pads Memory Foam Leatherette Extra Ear pads Memory Foam Cloth Microphone Pickup Pattern Cardioid (Unidirectional) Type Electret Condenser Size 6 mm Frequency Response 100 Hz-10 KHz WIRELESS Battery Life (rechargeable) up to 50h Wireless range up to 30 m Connection Type 2.4 GHz LIGHTSPEED