Features: *Wireless remote control duplicator,duplicate your existing remote controllers for cars,garage doors,gate doors,electric doors and windows,etc.Duplicate your existing remote controllers so you always have a backup. *315MHz,transmit distance is 50-100m(Open space),bringing you new experience of remote control and much convenience in your daily life. *High accuracy of copying and high effective of copying, faster copy data speed,not easy losing code,easy to install and use. *Ultra-small error of copying data code and copy oscillation resistance.Privacy is strong. *Handy key chain size attaches to your car keys no more unwanted bulkiness.