Digital Grain Seed Moisture Meter Rice Coffee Wheat 0 to 50% Range LED Indicator Tester Type: Grain Moisture Meter Measurement Range: 0~50% / Accuracy: +/-(0.5n%+0.5) Grains: 22 Species LED Indicator: Green LED: safe, air-dry state / Yellow LED: borderline state / Red LED: damp state Operating Conditions: Temperature: 0~50C / Humidity: below 90% RH