13 of 16 people found the following review helpful
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This review is from: SuperLED 2-Way Reversible Indoor/Outdoor Window Thermometer (Kitchen & Home)
Installed battery and fitted externally - expecting it to register 12 C (according to an analogue one)- but after 5 hours still showing 20.5 C (but does vary occasionally +/- 0.2!). Little use in recording external temperatures! Have requested refund.