Groov-e GVBT400BK Fusion Wireless Bluetooth or Wired Stereo Headphones - Black The Groov-e Fusion headphones are unique in that they can playback both wirelessly and with a wire. Bluetooth connectivity allows the headphones to playback wirelessly for up to 10 hours making them ideal for users on the go. A built-in microphone also allows users to make phone calls hands-free whilst in the car, at the office or on the move. A micro-USB charger is included for re-charging the headphones and within 2 hours, users are back on the move with up to 10 additional hours or wireless playback. Alternatively, for those who prefer to use a cable and save battery, the Fusion headphones feature a 3.5mm headphone jack for corded audio playback. This option is perfect for anyone on long plane journeys or who are simply staying put . The Fusion headphones are built for simplicity yet pack exceptional treble and bass, thanks to 40mm drivers. Over-ear noise isolating cushions also provide enhanced sound as well as long-listening comfort. Swivel earcups offer users the ease of adjusting the headphones to suit their needs and an adjustable headband with a folding mechanism allows for added comfort. The Groov-e Fusion headphones are perfect for users on the go or for those resting in the comfort of their homes. These versatile headphones are available 3 stunning colours options black, gold and silver. Wireless or Wired....the choice is yours! Features: Bluetooth Connectivity 10-12 hours Audio Playback Rechargeable Battery Hands-Free Mic Super Bass, Folding Design Soft Ear Pads,Swivel Ear Cups Removable 3.5mm Audio Cable Micro USB Charging Cable 40mm drivers for powerful bass and treble Impedence 32ohm Frequency 20Hz-20Khz Sensitivity 98dB+/-3dB Microphone Sensitivity -58dB