The TMA4 MicroModule is an extremely small ((H = 4.6cm x W = 4.6 cm x D = 1.6cm)) X10 Transmitter for 4 addresses and the commands ON and OFF. The TMA4 connects up to four maintained switches by wire leads and transmits up to four sequential X-10 ON/OFF addresses. MicroModules use two-way X-10 communication. Marmitek MicroModules are designed to fit in the rear of junction boxes, and behind any mains switch or outlet.
Further Information on Micro Modules click here.