Ideal for monitoring RH in labs and plants, tree plants, tree planting and controlled burning. Continuously and simultaneously displays relative humidity and temperature (in Farenheit and Celsius) with dual recall memories. Handy pocket clip makes it easy to carry. Memory displays highest and lowest temperature achieved overnight or during any time period. 1/2" high digital display can be read at a glance. Display shows changes in less than 30 seconds and is updated every second. Made from high impact, chemical resistant ANS plastic. 5.5" x 7/8" x 1". Weighs 1.5 oz. Comes with two silver-oxide batteries for continuous "always on" monitoring for 6 months. Vinyl carrying case. Humidity/Temperature Pen with Memory 11-661-14$42.95, 6/$227.70 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.