Specifications: Item condition - New - GATE-RC Decoder IC - Copy Code. Frequency - 433.92MHz. Operating voltage - 2pcs 3v (Free battery included) Transmit distance - 25-50m in open space. Open space means no any interference. No walls, no doors, no trees or any other obstructions. Interference like garage door or brick wall can reduce remote control range significantly. Product Description Duplicate Your Existing Remote Controllers so you always have a backup: Please check compatibility from the list below before purchase. Make sure your original remote control is exactly the same model from our compatibility list. If it is not same, please don't buy. if unsure, please ask as first about compatibility. Compatible with: TOP432SA TOP432A, TOP434A TOP432EE, TOP434EE TOP432EV, TOP434EV TOP432M, TOP434M TOP432NA, TOP434NA TOP432S, T432, T434 TWIN2, TWIN4 TAM432SA Easy to use: Step:1:Clear the history code from duplicator 1:Press button A and B continuously until LED flash 3 times 2.Release button B (Keep pressing button A),and press button B Slowly for 3 times,LED flash 3.Release button A,finish code clearance. Step 2,Copy code from original transmitter 1 Put duplicator aside of original transmitter,as close as possible. 2 Press and hold button A of original transmitter,then press and hold button A of duplicator until you see the duplicators LED flash 3 Release both buttons,finish code copy,copy other button in same Package contains: Package contains: 1X remote control 1X remote control chain 1X 12V 27A battery Shipping: Please ensure your delivery address is correct. Items will be shipped within 48 hours after payment is received / cleared (except weekends and holidays). Contact Us If you have any questions please ask me. I will reply within 24 hours. In the rare event that you have a problem with your item we strongly recommend contacting us before leaving negative or neutral feedback. We will be happy to help with your problem.