Hej David,
Thanks for confirmation that MPOW I19 + MPOW 456A BT 5.0 adapter is working.
Are you sure that you have MPOW 0-59 with BT5.0? because based on specification this is 4.0 and MPOW 0-59 PLUS/PRO has BT5.0 .
MPOW 0-59 BT40: https://www.xmpow.com/collections/059/products/mpow-059-bluetooth-headphones-over-ear-black
MPOW 0-59+ BT50: https://www.xmpow.com/collections/059/products/mpow-059-bluetooth-5-0-bluetooth-headphones-over-ear
MPOW 0-59 Pro BT50: https://www.xmpow.com/collections/059/products/mpow-059-bluetooth-5-0-bluetooth-headphones-over-ear
can you please provide link to MPOW I19 IPO which you have? Because on official mpow page there is no such headphones. Maybe you have Mpow H19 IPO?