AUDIO SPECIFICATIONS DRIVERS 40 mm DRIVER TYPE Dynamic DRIVER IMPEDANCE 32 Ω DRIVER SENSITIVITY 97 dB SPL FREQUENCY RESPONSE 20Hz-20kHz CONTROLS AND CONNECTIVITY WIRELESS CONNECTIVITY Bluetooth aptX(option) WIRED CONNECTIVITY 3.5 mm Input BLUETOOTH RANGE 10 m(option) CONTROL KNOB Yes MICROPHONE & REMOTE Yes PHYSICAL UNIT WEIGHT :178 g/6.28 oz INCLUDED IN THE BOX Major III Bluetooth Headphone(option) Micro USB Charging Cable Removal 3.5 mm Cable with Mic and Remote User Manual with Legal and Safety Information BATTERY BATTERY PLAYING TIME 30 hours + (at medium volume) TIME TO FULL RECHARGE 3 hours