1. Insert a small screwdriver into the slot and push the tab to remove the key from the transmitter.
2. Insert a small screwdriver into the slot and gently pry open the transmitter.
3. Remove the battery.
4. Put in the new battery (CR1620) with the positive pole (+) facing down.
5. Align the front and back covers and snap the transmitter shut.
Battery specification6. Install the key to the transmitter.