Product Description Battery Cover for XSW IEM EK Receiver From the Manufacturer About time to level up Make the move to personal monitoring with Sennheiser XS WIRELESS IEM. Defining new standards for simple, flexible, and reliable wireless in-ear monitoring, this system is designed to help you level up your sound – regardless of your experience level. Whether a rehearsal or live performance, on a club stage or for a worship service, benefit from renowned Sennheiser sound and solid wireless reliability packaged into a convenient, entry-level system – letting you focus on playing your best.