CatBee"isports" Series Rechargeable hands-free&nbsp;Wireless Bluetooth Headset Echo Cancellation Headphones Exercise/Running/Sports & Gym Headset Earphone&nbsp;with insert Microphone for cellphone ipad PC (Black) Single and double ear switch,which let you feel comfortable,free and relaxing whether you ride a bike,mountaineering,or running.Intelligent operation,experience the convenient of sports With in-ear style of innovative ergonomic design can stay in the ears comfortable Double batteries,super energy with no travel limitation,Can connect to two Bluetooth devices at same time The built-in Mic with voice prompts and voice reporting can answer incoming calls.Double-microphone noise cancellation.HD quality.Double ears piece 3D stereo sound Play/pause , Volume +/-, and next/previous track buttons, super easy operation