It covers application ranging from like auto door, window, lifting equipment, entrance access, etc. Strong signal which can pass through walls, floors and doors, control receiver from any place within a reliable distance. It is a learning code wireless remote control switch(receiver). It is easy to match the transmitter(remote control). The volume is small and the performance is stable and reliable, high receive sensitivity. Perfect wireless relay remote control for computer mainframe., Manufacturer: Ounfhtrttk