3 styles for Normstahl / Crawford 433 Garage 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 Transmission distance - 25-50m in open space. Open space means no interference. No walls, no doors, no trees or other obstacles. Interferences such as garage door or brick wall can significantly reduce the range of the remote control. NEW Remote Control Programming: 1) Open the lamp cover to expose the \"Learn\" or \"Code SET\" button. Otherwise, it is on the back of the motor head. 2) Press the \"Learn Button (* LED indicator lights up) 3) Press the remote control button you want to control the door with - the LED indicator turns off 4) Press the same remote control button again - the LED indicator starts flashing rapidly, programming is complete when the LED indicator stops flashing 5) Close the lamp cover Includes Remote control Battery Keychain English manual Professional certificate, quality assurance