Groov-e GVBT200PK Tempo Wireless Bluetooth Headphones with Mic - Pink The Tempo wireless headphones have a sleek contemporary design - making them look as good as they sound. These stylish headphones utilise Bluetooth technology, giving the listener excellent sound quality without the clunky cables. As well as wireless listening, the Tempo s sport a built in Microphone for hands free calling and have up to eight hours of talk time between charge - listening time is ten to twelve hours delivered via the built in rechargeable battery. As well as looking great, the Tempo is easy to use with control buttons on the outside of the adjustable head band. The Tempo is comfortable with great sound quality and has the design to turn heads. Features: Wireless music playback Built-in microphone for hands-free operation A2DP Stereo sound Wind noise reduction and echo cancellation Built-in rechargeable battery for 10-12 hours music playback/talk time Charging time 2.5 hours Works with all Bluetooth enabled devices Adjustable headband Comfortable and lightweight Micro USB charging cable (included) Driver Unit 40mm Sensitivity 42dB Frequency Response 80Hzto20KHz