This listing is for an Antenna Switch Board from an Icom IC-751Icom Part Number B-721BThis is the board with the impossible to find antenna relay that goes bad on high use radios. The radio this came from was extremely low hours. I tested it and it worked without fail for many hours. The AMP Key relay is also tested and working properly. This is a good spare to have on hand if you like Icom radios. You will receive the EXACT item shown in the picture.Thanks for looking!!! _gsrx_vers_1516 (GS 9.3 (1516))