1. Take the handset off its base and removethe belt clip by pressing on one of itssides.2. Insert a flat screwdriver into the slot andpress to open the handset.When you change the controller batteries, it is also advisable to change the handset batteries.3. Replace the flat MTU01X battery with anew once.4. Close the handset, put the belt clip backon and then place the handset back onits base in order to start it up.5. Programme the time usingand .The temperature display will be updatedseveral minutes after the handset hasbeen powered.If necessary, the iconflashes to indicate that thehandset is charging.3.5C10.2 In the handset61