This Receiver, although not waterproof binds the same as a Sanwa 471 and functions the same. The antenna is same length as 471. I have tested for function and I didn’t have any glitches at about 400 feet. I doubt it will work with the MX6 transmitter as that seems to have just one dedicated FH3 receiver. Offering this product because of the scarcity of the Sanwa 471W. It seems to be a great option for the price.