digital thermometer.Display Indoor and outdoor temperature simultaneously Switch between C/F.

digital thermometer BT-1

Function and features:
Display Indoor and outdoor temperature simultaneously
Switch between °C/F
Max./Min. temperature value memory
Max./Min. temperature value recovery function

Technical parameters:
Measuring range: Indoor temperature -30°C～+50°C(-22F～122F)
Outdoor temperature -50°C～70°C(-58F～158F)
Resolution:0.1°C
Power supply: one 7# Alkaline battery

Instruction:
Display current temperature value when install the battery.
Min Key: press it then display the Min. memory value
Max key: press it then display the Max. memory value
Reset key: under Min/Max. modes, press "Reset" then the former memory value returns to the current value.
C/F: under °C mode to display Celsius; under F mode to display Fahrenheit