Fangrui Product Details This Is A Fixed And Roling Frequency Remote Cloner (433.92mhz) For Copying 99. Common Fixed And Learning Code Remote Controls. Compatible With Most Chips: These 433mhz Automatic Sliding Gate Opener Are Compatible With 2264, 2260,1527, Fp527, 2240, Smc918, And So On; Please Confirm Your Chips Whether Suitable Before Ordering Easy To Duplicate: After Removing The Old Code, You Need To Put The Universal Gate Controller, Remote Control Side By Side, And A Button, Then The Corresponding Button To Copy The Old Remote Control, Led Indicator Flash 3 Times To Let Go, And Other Corresponding Keys Clear The Old Code: And Hold The A And B Keys On The Automatic Electric Door Opener At The Same Time Until The Led Indicator Flashes Continuously Before Releasing; You Can Any Key To Test, If The Led Indicator Flashes Instead Of Blinking All The Time, It Means The Code Has Been Cleared 4 Keys To Control: There Are 4 Buttons On The Remote Controls For Gates, A, B, C, D, Are Applied For Opening, Closing And Stopping Door