R-Tek RT-913 Digital Humidity & Temperature Meter Temperature & Humidity Sensor

Specification: Humidity Range: 0?`100%RH Humidity Accuracy: 45~75%RH:±3%RH other;±5%RH Temperature Range: -20°C~70°C/-4ºF~158ºF Temperature accuracy: ±1.0ºC Dew Point Temp. Range: -20º~70ºC/-4ºF~158ºF Dew Point Temp. accuracy: ±1.5ºC Wet bulb temp. Range: -20ºC~70ºC/-4ºF~158ºF Wet Bulb Temp. accuracy: ±1.5ºC Sampling Rate: 2times/second Operating Conditions: -20ºC~60ºC/-4ºF~140ºF:10%RH to 90%RH Storage Conditions: -20ºC~60ºC/-4ºF~140ºF:10%RH to 90%RH Power supply: 3*1.5V “AAA” batteries Battery life: at least 50 hours