Elitech BT-3 室内/室外数字湿度计温度计 (0-50℃/ 20-99%RH)

Internal sensor measuring range: 0-50℃(32-122℉); 20-99%RH

External sensor measuring range(temperature only): -50 ~ +70℃ (-58 ~ +158°F)

Resolution: 0.1 ℃ /0.1 F ;1%RH

Power supply :1.5V DC AAA battery

External sensor wire length: 2m

Service 1-year warranty. 30 days free & easy return 

Datasheet