*433MHz copying transmitter:duplicate your existing remote controllers for cars,garage doors, gate doors,electric doors and windows,home automation lighting and etc.*Easy to use, the 4 channel remote control key fob lets you easily copy most remote control fobs.*4-Channel RF wireless remote control duplicator for garage doors,cars, gates any fixed code system on 433MHz frequency,bringing you new experience of remote control and much convenience in your daily life.*High accuracy of copying and high effective of copying,easy to install and use.*Four colors optional(Red/Green/Blue/Yellow).