1.RF remote control with 4 buttons 2.chip:fixed/learning/rolling code; 3, ... 80m 5.CE,ROSE More than 100 kinds models of remote control with good quality reasonable price,widely used in garage door ... ,rolling door , car alarm system ,home appliance,remote switch ,LED and other industral control . They are sold to Europe ,South America ... all kind of doors/windows controllers and other industrial control.