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.    <br />                                          <br /><strong>Specifications:</strong><br />Ambient temperature<br />Range: -20 to 60⊂C (-4 to 140⊂F)<br />Precision: ≤0.5⊂C (0 to 45⊂C)<br />≤1.0⊂C(-20 to 0⊂C，45 to 60⊂C)<br />Resolution: 0.1⊂C/⊂F<br />Update rate: 400ms<br />sensor’s type: High-Precision digital sensor(SHT75)<br />RH<br />Range: 0 to 100%RH<br />Accuracy : ≤2.0% RH(10% to 90%)<br />≤3.0% RH(0% to 10%，90% to 100%)<br />Resolution: 0.1%<br />Update rate: 400ms<br />Sensor’s type: High-precision digital sensor(SHT75)<br />WB<br />Range: -20 to 60⊂C (-4 to 140⊂F)<br />Precision : ≤0.5⊂C (0 to 45⊂C)<br />≤1.0⊂C(-20 to 0⊂C，45 to 60⊂C)<br />Resolution: 0.1⊂C/⊂F<br />Update rate: 400ms<br />DP<br />Range: -50 to 60⊂C (-58 to 140⊂F)<br />precision : ≤0.5⊂C (0 to 45⊂C)<br />≤1.0⊂C(-50 to 0⊂C，45 to 60⊂C)<br />Resolution: 0.1⊂C/⊂F<br />Update rate: 400ms<br />Data Hold: ↔<br />Display Back Light: ↔<br />MAX/MIN: ↔<br />Data Logging up to 100 groups<br />Low battery indication<br />Power Supply: 4 * 1.5V AAA Batteries(Not included)<br />Package size: 23 * 11 * 6cm / 9.1 * 4.3 * 2.3in<br />Package weight: 267g / 9.4oz<br /><br /><strong>Package list:</strong><br />1 * HYELEC MS6508 Digital Temperature Humidity Meter<br />1 * English Manual