Model: SM206. Battery: 9V battery ( NOT included ). Resolution: 0.1W/m², 0.1Btu/(ft²-h). Storage Temperature and Humidity: -10~50℃, <70%RH. Size: Approx. 132 x 60 x 38mm / 5.2 x 2.4 x 1.5in. There are two units that can be selected: W/m² and Btu.
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