Behringer BT251-BK Bluetooth* Wireless Adapter for In-Ear Monitors with MMCX Connectors

I have Shure drivers, and I went through 2 Shure BT2's. I use these under my moto and snowboard helmets, and I take them everywhere I ride. These lasted a whole 10 months on $30... I suppose it's not terrible but still wish the quality was better. I miss a sort of cable clip for the slack behind my neck, which would probably help with the cables loosing their connection after a few months.

Had to return it cause the left ear connector was not working properly, with connection going on and off.

Behringer BT251-BK Bluetooth* Wireless Adapter with MMCX connectors are perfectly adequate for in in-ear monitors

These are the most rubbish bt adaptor available, low build quality. Don't charge properly, noise in the lines. DO NOT BUY THIS PRODUCT. 0 stars

SHURE SE425で使用してますが、問題なし電池の持ちがもうちょっと良いといいですが、値段考えればこれで十分のではないかとも思います。