You have a great pair of IEMs and sometimes you want to discard completely the cable, a TWS (true wireless stereo) adapter provides a solution whether you have MMXC or 2-pin connector IEMs. They come in form of attachments to IEMs and go over your ears.
Note that unlike Shure Aonic 215 that provide the seamless experience for Shure 215 IEMs, these adapters may produce some hiss sound when pair with your IEMs because they are not generally configured to specific models.
Adapters with Qualcomm Bluetooth Chipset on board seem to have more solid Bluetooth connection and better sound quality.
Check your IEMs' connector types before purchasing a pair of adapters.