Compatible models: GOL4C How to - It is easy Step:1:Clear the history code from duplicator 1.Press button A and B continuously until LED flash 3 2.Release button B (Keep pressing button A),and press button B Slowly for 3 ,LED flash 3.Release button "A",finish code clearance. ,Copy code from transmitter 1.Put duplicator of transmitter,as as possible. 2.Press and hold button A of transmitter,then press and hold button A of duplicator until you see the duplicator's LED flash 3.Release both buttons,finish code copy,copy other button in same way. Button A= Lock button Button B=unlock button Colour:black + silver Material:ABS Package Contents: 1 x Remote Control Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.