If it has FDSR it will detect mrcd but it will report it as a generic K band without frequency display so you will not know if it is K band false or if it is legitimate MRCD. I am not sure how low it will scan on the K band spectrum. Whistler is very good at detecting laser and will even pick up Poliscan with enough warning to save you. Here is a YouTube video showing Whistler detecting redflex and MRCT
thanks buddy for the info. when it comes to the laser, it actually detects very well better than the Uniden R3 I currently have and it does not cope with it at all. I am more interested if it will be able to go down to 24.00 GHz because for me mrcd works on different ghz band "K" is variable.