Portable Mini Cup Grain Humidity Meter for Coffee Cocoa Rice Wheat 25 Kinds Grains Humidity Tester Item Type: Grain Humidity Meter Material: ABS Weight: Approx. 580.00g / 20.46oz Product Size: Approx. 165x78x73mm / 6.5x3.1x2.9in Main Unit Battery (Battery Not Included): 4 x AAA Battery Cap Battery (Battery Built in): 1 x Battery, 1 x CR2032 210MAH Indicator: Low Battery Indicator Measurement Resolution: Humidity 0.1% Humidity Measurement Accuracy: Standard Grain: ±0.5% Within 10% Range <±1% >±1.5% Within 10% Range, If The Humidity Is Too High, The Error Will Increase Measurement Correction Function Device Structure: 1. Sound When Tightening The Lid, Indicating Proper Clamping Force 2. Measuring Chamber 3. Abs Body 4. LCD Backlit Display 5. Membrane Keyboard Preparation Before Use: 1. Open The Lid Of The Measuring Bucket And Ensure That The Cover Of The Measuring Chamber Hygrometer Is Clean And Dry. 2. Open The Battery Compartment Cover On The Back Of The Instrument And Insert 4 x (AAA 1.5V) Batteries, According To The Polarity Shown. 3. Prepare The Sample To Be Tested, Preliminary Screening Of Impurities, Keep The Sample And Instrument In The Same Place As Long As Possible To Maintain Environmental Temperature Balance. Measured Varieties: Wheat, Rye, Corn, Maize, Soybeans, Rice, Barley, Oats, Sorghum, Buckwheat, Peas, Rapeseed, Coffee, Green Coffee, Cocoa Beans, Flaxseed, Lentils, Beans