Features:
100% new and high quality.
This is a battery meter for measuring relative humidity and temperature.
Can display three types of temperatures around the sensors air via several convenient procedures : The ambient temperature, the dew-point temperature and the wet bulb temperature. 
 
Specifications: 
Ambient Temperature
Range : -20 to 60°C (-4 to 140°F)
Precision : ±0.5°C (0 to 45°C)
±1.0°C(-20 to 0°C,45 to 60°C)
Resolution : 0.1°C/°F
Update rate : 400ms
sensors type : High-Precision digital sensor(SHT75)
 
Relative Humidity
Range : 0 to 100%RH
Accuracy : ±2.0% RH(10% to 90%)
±3.0% RH(0% to 10%,90% to 100%)
Resolution : 0.1%
Update rate : 400ms
Sensors type : High-precision digital sensor(SHT75)
 
Wet Bulb
Range : -20 to 60°C (-4 to 140°F)
Precision : ±0.5°C (0 to 45°C)
±1.0°C(-20 to 0°C,45 to 60°C)
Resolution : 0.1°C/°F
Update rate : 400ms
 
Dew Point
Range : -50 to 60°C (-58 to 140°F)
precision : ±0.5°C (0 to 45°C)
±1.0°C(-50 to 0°C,45 to 60°C)
 
Battery voltage: 4*1.5V AAA(Not Included)
Size : 184*60*29mm
Color: Green & black
 
Package Includes: 
1 x Mastech MS6508 Digital Ambient Temperature Humidity Moisture Wet Bulb Meter
ZC424100-ALL-1-1ZC424100-D-2-1ZC424100-D-3-1ZC424100-D-4-1ZC424100-D-5-1ZC424100-D-6-1