Groov-e Ultra wireless headphones boast a superior powerful sound. The around-ear headset is perfect for every day listening. With Bluetooth 4.0 and 40mm drivers, these headphones deliver high quality sound with satisfyingly dynamic bass. With 15 hours playback time, the padded headband ensures ultimate comfort and makes them ideal for use while relaxing, as well as for those on the move. Features and Benefits Bluetooth or Corded - both options for you to enjoy! Super Bass - 40mm drivers for powerful bass and treble. Comfortable - Soft, over-ears cushions for long listening comfort. Noise Isolating cushions - for enhanced sound Specifications 40mm drivers 15 hours wirless music playback (Bluetooth) 3.5mm headphone jack for corded audio playback (non-Bluetooth) Super Bass Rechargeable battery Built-in mic for hands-free calling Swivel earcups making them easy to store Micro-USB Charging Cable (included) Removable Audio Cable (included) Bluetooth Chipset: CSR, Version 4.0 Bluetooth Profiles: HSP, HFP, A2DP and AVRCP RF Range: 10M (open area) Battery: Lithium battery 400mAH Colour: Black