Jumbl Bluetooth 4.0 Hands-Free Calling & A2DP Audio Streaming Adapter/Receiver - Blue Turns Your Favorite Wired Headphones Into Wireless Ones Bluetooth 4.0 With Multipoint Technology For Simultaneous Connection To Multiple Devices Built-In Echo/Noise Cancelling Microphone w/Titanium Drivers Built-In Rechargeable Battery: 10+ Hours On Full Charge - Micro USB Charging Cable Included Big Buttons For Common Device Controls; Perfect For Exercising