This switch allows you to to combine signal from two satellites and install it on up to 4 satellite receiver. Need to go to 6 receiver? Buy a 3X4 switch and this 4x3 switch. Then you can "piggy back" them. see diagram below! 2 satellites to 4 receivers (4X4 Switch Diagram)
zinwell is just a company name...and multiswitches are commonly used in FTA..which one U use with which FTA receiver will determine its compatability..