Hi, I bought a cheap BT adapter(made by chinese company Twister) which has >5.6 ms latency even with controller right next to it. When I move controller a bit away(about 1 ft), latency jumps above 10 ms, even reaching 30+. Its LMP version is 3.3164.
Where I live, I can only find two good BT adapters, rest are same BT 2.0 or are very expensive($60+). They are: