Review on Etymotic Research ER2XR-BT: Enhanced Audio Experience with Wireless Bluetooth Connectivity in Black by Phillip Hoover

Overall sound quality and comfort are excellent. But disappointed that it still uses a Micro-B connector instead of a USB Type-C. There's also no rubber cover for the USB port, which I've found in many cheaper Bluetooth cable alternatives. The other reviewer is correct, the device turns off randomly. bad when i used it in a jacket i got an alternative. Shure BT2 fits ER2XR or any other ER series. Buy headphones and buy Shure BT2, it is not necessary.