Model: YY-400HMaterial: ABSProduct size: 183*37mmNet weight: 78gColor box size: 235*80*45mmPackaging weight: 140gVoltage: 4.5VBattery: 3*1.5 button battery (LR44)Function: H2/TEMP detectionMeasuring range: H2: 0-24000ppdTEMP: -20-60Accuracy: 0.01ppmResolution: 0.001Waterproof grade: IP67Applicable industries: household drinking water, swimming pools, aquaculture, fish tanks, laboratories, etc.Ultra-large display reading: high-definition display, the measured value can be known on one sideHigh-precision probe: using high-precision waterproof probe, accurate measurement and sensitive responseLarge-capacity button battery: built-in 3 1.5V button batteries, long-lasting Durable, easy to replacePackage Contents: 1*Backlight YY-400H [2 in 1]