Wireless smart sports stereo earphones. Built in magnet. Custom made fit for blackberry with built in mic for handfree calls. The extention cable is apply for PC & Notebook with online voice chatting and comfotrtable for listening. Light weight 30g, about 3h use time and 100h stand by. Voice dial and redial. 10 metre range. Up to 3h talk time.Charge time <2.5h. Available color: pink, black and bronz. Please specify the color of your choice in the detail section.