System The SK-D10R2 RF receiver are compatible with bath code hopping and fixed-code transmitters. They can be used for a variety of applications, such as allowing the same transmitter to disarming & vehicle alarm and open/close a garage Dane opener. The SK-910R2 receiver has two-channel outputs. Each channel can learn the codes different transmitter buttons en a first-in, first-out basis. Installation Notes 1.