... 2 Bluetooth Headphone Module 1.HS/HF, A2DP, AVRCP, OPP, DUN, SPP profiles 2.Class 2 3.UART&USB 4.Small Size ... MDCS56 Class 2 Bluetooth Headphone ModuleIt is a improved model in audio ... /HF, A2DP, AVRCP, OPP, DUN, SPP, and etc.. UART and USB programming and data interfaces. Small form factor. 8M bit flash ...