Extech RH10  

Extech RH10: Pocket Series Hygro-Thermometer

Compact, One-Button Operation Humidity/Temperature Meter

The Extech RH10 is a pocket sized meter with automatic LCD backlight and double molded grip. The meter measures relative humidity from 0 to 100% RH, temperature from -4 degree to 140 degree F (-20 degree to 60 degree C) and records max/min readings. This product is complete with a 9V battery and built in sensor.