May also be used with many other earphones that have MMCX connectors
Connectivity technology: Wired
Description
The ER2 Standard Replacement cable is the blue standard cable replacement for the cable that comes with the Etymotic ER2SE and ER2XR. Etymotic utilizes an MMCX connector with a special “key” that helps lock the cable in place and protects the integrity of the connector. This cable may also be used with many other earphones that have MMCX connectors.