DISCONTINUED ITEM-LTD QTY AVAILABLE In this 2 part kit you build a handheld I/R transmitter with 8 control buttons and a receiver that decodes the transmitted I/R signal and activates 8 SPDT-1A relays. 6 of the relays stay on as long as the corresponding button is pressed while 2 are alternate action (once on, once more for off). Multiple buttons can be active at the same time. Transmitter has a plastic case with battery compartment. Case requires that you drill and assemble. The receiver board is uncased.