Many many years ago, @zerodeefex pieced together a solution to run his IEMs via Bluetooth / LDAC for devices that supported Android O. This solution consisted of the Sony "XBA Series Bluetooth Upgrade" or MUC-M2BT1 (probably not availability in North America) and a few wire hooks. Fast forward a few years, and Shanling has made this solution easy for us with their MW200 IEM Bluetooth doodad. The MW200 cables are terminated for use with MMCX micro coaxial IEMs. There is no need to purchase over the ear hooks are these are built into the cable. I guess the downside is if one uses IEMs where the cables drop down. An AKM DAC/amp chip deal feeds the IEMs. I have only have a chance to try the MW200 with Campfire IEMs, known for their super sensitivity. I can happily report that I do not hear any hiss or noise. BTW, the price is a stupid low $120. If I had any complaints, it would have been the manual. It was printed in one of those 2" fold outs. As such, the text was too small for anyone in my family to read, with the exception of my son who is 12 years old and has perfect vision. Not that it mattered anyway as the device was easy enough to figure out without reading the manual. Basically press the power button a few seconds to turn on, or turn off. I've paired the MW200 with a laptop, my Pixel 2, iPhone 8, and Shanling M8 portable player - all without a single hitch. Everything just worked perfectly. Note that charging is with a USB C connector. However, I found the high-power USB connectors provided with the Android phones (USB C both ends) unable to charge the MW200. A USB charger with USB B connector on the power brick end was required. I've added the scanned instructions below for convenience.