"Enjoy Hi-Fi Stereo Quality Music and also answer Calls even from 30+ Feet with Harmonics 202 - the in-ear Bluetooth Headphones. Harmonics 202 Uses Latest Bluetooth 4.1 which gives much Clearer Sound, Conserves Battery Power for much longer Playtime and also gives ""Automatic Reconnection"" to previously Paired Devices. Harmonics 202 Can Work with Lower Bluetooth Versions also. Smart Magnet Switch operates by Simply Connecting or Separating the Magnetic Ear-buds so that you can Conveniently Pair Device, Play & Pause Music and Take Calls using this switch."