Digital Hygro-Thermometer 

hygro-thermometer/ max min/ C&F switch function 

Measuring Range:

     Indoor temperature: -10~50C or 14~122F
     Outdoor temperature: -50~70C or -58~158F
     Indoor humidity: 20%~99% RH
. Accurcy: +/-1C or 2F, +/-5%RH
. Display Resolution: 0.1C or 0.1F, 1% RH
. C/F Switch
. Max/ Min Temperature & Humidity Records
. Operating Voltage: 1.5V ( AAA )
. Use of the environment: -10~+50C