STM receiver is designed to control one roller 230VAC electric induction motor with limit switch.,Very small size of the receiver enables its installation under a wall switch inside the junction box 60mm deep. ,It may also be installed inside the housing of the roller.,STM includes superheterodyne radio receiver, KEELOQ® dynamic code encryption and is compatible with the following Elmes Electronic keyfobhand transmitters: DWB100T, DW200HT, CH4HT, CH4H200T, CH8HT, CH32HT.Note: It is not compatible with