The BM-8761BTV-AT01 is dual-mode (BR/EDR + Low Energy) UART Interface and using Realtek RTL8761BTV chip complies with Bluetooth 5. It combines a BT Protocol Stack for LM, LL, and LE.
The BM-8761BTV-AT01 is compatible with previous versions, including v2.1 + LE. For BR/EDR, it allows multiple active links in either slave mode or master mode. For Low Energy, it supports multiple states and allows multiple active links in slave mode. A BR/EDR link and an LE link can be active at the same time.