... as origin 4. Adjustable frequency Model No.: DL-4021CDescription:Auto-copy 2262/2240/2260 RF Remote control duplicator How wonderful if we ... the gate(barrier) at the entrance.This remote wireless control is fit for car alarms, home alarms, panic buttons, garage ... learning in secondsApplication:car alarms, home alarms, panic buttons, garage door, rolling curtain, etc Frequency:280-490Mhz Learning code ...