GARAGE DOOR REMOTE CONTROL USER'S INSTRUCTIONS (MODEL * CSL) PROGRAMMING YOUR NEW TRANSMITTER 1. Open the case with a cam 2. For code setting: Open your existing transmitter or the cover on receiver located on your garage door opener. Set the DIP switches to match the code of your existing transmitter of receiver. Then re-close the case. LIGHT Press the case to emit the light BATTERY One 3 volt Lithium type (CR2032) battery included.