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I . Technical parameters Operating voltage: DC12V Operating current: 10MA Frequency available: Fixed frequency 315/433.92MHz (We can do customized frequency) Adjustable frequency:290MHz-480MHz Ambient temperature : -20 °C +50 °C Kelvin 4-Channel RF Wireless Remote Control Duplicator for Cars, Garage Doors , Gates doors, Alarm systems etc. Fixed frequency (433.92mhz or 315mhz) for copying 99.99% common fixed and learning code remote controls. Face to face copy the functions of your original remote by this 4-channel RF remote control duplicator with code learning functions and you'll always have a back up. Duplicate Your Existing Remote Controllers: Vehicle central locking systems Garage doors Electronic gates Electrical appliances Car sunroofs Heating systems Easy to install and use, the 4 channel remote control system lets you take control of your gadgets, car and home or garage. Works with the following remote control modules (please check your existing remote control before ordering): Your remotes also should be Fixed code or Learning code. •2260, 2262, FP527, HT12D , HT12E , PT2240, S026-1 ,S026-2 ,S026-3 ,S026-4, SMC918.... etc Please note this does not copy rolling codeMethods of operation 1, Clear out code:Press A and Bat the same time, two seconds later, LED flashes three times, followed by a continuous fast blinking. Indicates that the remote control code stored was deleted.2, Duplicating (learning)RightHands press original remote control A, andleft hand press remote control duplicator A', 2 remote controls put together as close as possible, while pressing the remote controls two match button,(eg: A-A’,B-B’) three seconds later, LED indicator light flashes three times, followed by a continuous fast blinking. That's mean successfully copied.3, Recovery codePress A and C at same time , 3 seconds later, LED indicator light flashes three times, followed by a continuous fast blinking. This indicates that the original remote control codes have been restored.The other way, you can delete all and relearn them again.