Powered by 2 AAA batteries for up to 50 hr consecutive use, M130 environmental meter measures wind speed up to 55 mph with 30 mm vane and shows results in m/s, kph, mph, knots, or fpm on 3¾ digit display. Along with light air response of 0.4 m/s, features include Max/Ave/Min and data hold, zero adjustment, auto power off and disable function, and low battery indicator. Measuring 5.3 x 1.9 x 0.2 in., instrument weighs 2.8 oz.
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