Save on electricity costs and keep food fresh by ensuring your fridge or freezer is operating at the correct temperature Appliance acting up? Simply check the easy-read dial - it's marked with coloured zones showing ideal freezing and cooling temperatures It sticks securely to the inside of your fridge or freezer with its suction cups. Or, if you prefer it can be hung or stood With no buttons or batteries, it's simple, reliable and accurate Twelve month guarantee