Product size: 115*64*19mm 

 Display size:63*43mm 

Temperature measure range:

Inner temperature:-30℃~50℃;

Outer temperature:-50℃~70℃ 

Humidity measure range:20%RH~99%RH 

Power supply: DC1.5V one 7# alkaline battery (optional) .

Resolution:temperature:0.1℃(0.2℉),

humidity:1%RH .

Accuracy:temperature:±1℃,

humidity:±5%(at +25℃)