This product is a portable multi-functional anemometer, and it is suitable for measuring temperature, humidity, wind chill, dew point, wind speed, barometric pressure, altitude and illumination.

Because the measurement of altitude is influenced by barometric pressure and temperature, so the altitude values measured in different seasons and different climates are different, but in the same day and condition that, barometric pressure and temperature slightly vary, the altitude reading is, stable, so it can be used for measuring the altitude difference.

*This unit was designed according to following standards: 
----A. International electrician committee standard: IEC PUB 651 TYPE2 
----B. US national standard: ANSI S1.4 TYPE2
*Measuring range: 30~130 dBA
*Accuracy: ±1.5 dB
*Digit & Resolution: 4 digits & 0.1 dB
*Frequency response: 31.5Hz ~8.5KHz
* Frequency weighting characteristic: A
*Sampling rate: 2times/second
*Microphone:1/2 inch polarization capacitance microphone
*Max reading
*Automatic backlight
*Low battery indication
*Automatic power off

*Packing method: Blister + Card
*Power: 9V battery (6F22)
*Dimension: 57*36*149mm
*Weight: 144g (including battery)