The SRE301 is a slim aesthetical mechanical/electronic adapter that allows using SENNHEISER microphone heads (type KK, ME and MD) with Wisycom handheld transmitters MTH30x/MTH40x
The SRE300 is a slim aesthetical mechanical/electronic adapter that allows using SHURE microphone heads (type Beta 58/87/KSM9) with Wisycom handheld transmitters MTH30x/MTH40x Small profile 11 mm.