3 Styles for Normstahl / Crawford 433 Garage Gate Door Remote Control with Rolling Code Feature: - Compatible with Crawford garage door opener - Number of channels: 4 / 2 - Frequency: 433.92 MHz - Battery: 12V 27A / CR2032 - Third-party remote control (not made by Crawford) Compatible Models: 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: 25–50 meters in open space (no interference from walls, doors, trees, or other obstructions). Interference may significantly reduce range. Programming Instructions: 1) Open the Courtesy Lamp Cover to expose the "Learn" or "Code SET" button (located on the rear of the motor head if not visible). 2) Press the "Learn Button" (LED indicator will glow solid). 3) Press the remote button you want to assign — LED indicator will turn off. 4) Press the same remote button again — LED indicator will flash rapidly. Programming is complete when the LED stops flashing. 5) Close the Courtesy Lamp Cover. Includes: Remote control, battery, keychain, and English manual. Professional certificate and quality assurance.