1. Open the battery door with a screwdriver (not included).

2. If used batteries are present, remove these batteries from the unit by pulling up on one end of each battery. DO NOT remove or install batteries using sharp or metal tools.

3. Install 3 new LR44 button cell batteries as shown in the polarity diagram (+/-) inside the battery compartment.

4. Replace battery door securely.

5. Check your local laws and regulations for correct recycling and/or battery disposal.