1. Firstly, make sure you have 3 pieces CR123A Lithium (the muuun accepts only this type of battery!).

2. Then remove the mounting base of the device

 

3. Remove ALL the old batteries from the battery slots

4. Press the TEST button to fully discharge muuun’s internal electrical capacitors

5. Position ALL new batteries (3 pcs.) into the battery slots. Mind the polarity terminals!

6. If the batteries are positioned correctly, then all 3 LED will glow alternately for 60 sec., confirming that muuun is operational

7. Firmly re-attach the muuun to the mounting base

8. DONE! The batteries are replaced successfully

! The muuun will start beeping in case if the batteries were replaced or positioned incorrectly!