1defrost thermostats is UL,CUL,VDE,CE,TUV certified 2. Easy to install ... or narrow spaces due to slim shape This defrost thermostats is UL,CUL,VDE,CE,TUV certified, and well sold in ... : Min±2°C; Standard±5°CNOTE: If those shown are not acceptable, Please contact us to discuss specific requirement. Defrost thermostat