Conditions For Choosing A Duplicate Remote Control: The Remote Control Has Normal Functions, Is Chip Compatible, And Has The Correct Frequency. This Program Can Only Copy Remote Controls With Fixed Codes, Learning Code Chips And Some Rolling Code Remote Controls. Car Remote Controls, Two-Way Remote Controls, And Ic Program-Encrypted Remote Controls Cannot Be Copied. Before Copying The Remote Control, Please Make Sure That The Existing Code On The Remote Control Has Been Deleted. Otherwise, Copying Cannot Take Place. To Avoid Interference During Operation. When Copying, From Electronic Signals, Such As Mobile Phones, And Transmission Products, Such As Wireless Cats. Make Sure Your Remote Control Has Enough Power. When Copying, The Closer The Distance Between The Two Remote Controls Is, The Better! When Pressing And Holding The Button Of The Remote Control, The Transmission Signal Must Be Normal, And Then The Button Of The Copy Remote Control To That The Functions Are Copied. Scope Of Application: Remote Control Garage Doors, Telescopic Doors, Rolling Shutter Doors, Remote Control Electric Doors And , Remote Control Switches, Anti-Theft Alarms, Smart Homes, Automotive Electronics, Central Locks, Parking Locks, Industrial Control And Other Wireless Application Fields. As Long As The Working Frequency Of The Wireless Remote Control Is The Same As Or Compatible With The Remote Control Chip, It Can Be Used For Garage Doors, Rolling Shutter Doors, Barrier Gates, Telescopic Doors, Alarms, Remote-Controlled Electric Doors And , Smart Switches And Other Wireless Remote Control Equipment. If You Do Not Have Professional Knowledge And Need To Match The Remote Control Yourself, It Is Recommended To Purchase A Duplicate Remote Control (Can Copy Multiple Chips). Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Specifications: 433Mhz Material: ABS colour: As Shown Package Contents: 4 x DIP Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.