This is a battery meter for measuring relative humidity and temperature. It can display three types of temperatures around the sensor’s 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
sensor’s type: High-Precision digital sensor(SHT75)
RH
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
Sensor’s type: High-precision digital sensor(SHT75)
WB
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
DP
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)
Resolution: 0.1°C/°F
Update rate: 400ms
Data Hold: √
Display Back Light: √
MAX/MIN: √
Data Logging up to 100 groups
Low battery indication
Power Supply: 4 * 1.5V AAA Batteries (Not included)
Package size: 23 * 11 * 6cm / 9.1 * 4.3 * 2.3in
Package weight: 267g / 9.4oz

Package list:H11416
1 * PEAKMETER MS6508 Digital Temperature Humidity Meter
1 * English Manual