For professional use get this Mirfak Dual Channel Compact Wireless Microphone System. It has a 2.4 GHz dual channel system that gives a smooth wireless performance. With an in-built Omni-directional mic and clip-on transmitters, it delivers hassle-free usage. You can even record audio as it comes with an SD card slot. Besides, the 3.5mm input jack lets you connect external microphones with it.
2.4 GHz Dual Channel Compact Digital Wireless Microphone System
Clip-on Transmitters with Built-in Omni-directional Microphones
3.5mm Input Jack for External Microphones, SD Card slot for Audio Recording
Wireless Receiver with full color LCD screen