*Easy to install and combine with the transmitter,with a hook on the transmitter,very convenient to use.*Wide using scope, it can connect to the electronic control lock, intercom doorbell, garage door, light, automatic door/window, household appliances for security system, etc.*High receiver sensibility. You can connect or disconnect the receiver to the transmitter within a distance of confidence.*Super small size, taking up very little space. The receiver board size is only about 4*4*2.6cm.*Stable and reliable, stable performance.Can pass through walls, floors and doors, control receiver from any place within a reliable distance.