https://www.shure.com/en-US/products/accessories/rmce-bt1
RMCE-BT1 - Shure USA
Wireless earphone accessory cable with Remote + Mic for SE model earphones with detachable cables (SE215, SE315, SE425, SE535, SE846).
rmcebt1shureusa
https://www.shure.com/en-US/docs/guide/RMCE-USB
RMCE-USB User Guide - Shure
The ShurePlus USB accessory cable user guide.
user guidermceusbshure