3 Styles for Normstahl / Crawford 433 Garage Gate Door Remote Control Rolling Code Feature: 1) Compatible with: Crawford garage door opener. 2) Number of channels: 4 / 2 3) Frequency: 433.92Mhz 4) Battery:12V 27A /CR2032 5) This is a third party remote control. NOT made by Crawford. Compatible Model: Normstahl / Crawford EA433 2KS Normstahl / Crawford EA433 4KS Normstahl / Crawford RCU433-2 Normstahl / Crawford RCU433-4 Normstahl / Crawford N002800 Normstahl / Crawford EA433 2KM Micro Normstahl / Crawford T433-4 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. Remote Programming: 1) Open the Courtesy Lamp Cover to expose the Learn" or "Code SET" button. Otherwise it is on the rear of the motor head. 2) Press the "Learn Button (* LED Indicator will glow solid) 3) Press the Remote button you want to control the door - LED indicator will extinguish 4) Press the same Remote button again - LED indicator will begin to flash rapidly, programming is complete once the LED Indicator ceases to flash 5) Close the Courtesy Lamp Cover Include Remote Control Battery Keychain English Manual Professional certificate, quality assurance