Feature:1. Test the DO(dissolved oxygen) value and temperature(/) of water.2. Pen-type intelligent dissolved oxygen analyzer, portable and easy to carry.3. Facilitate the user to carry on-site operation to display dissolved oxygen values and temperatures.4. Pocket size, lightweight with backlight \u0026 large LCD display for clear and easy reading.5. Apply in soil-free growing, aquarium, swimming pools, freshwater culture, mariculture, beverage factory, wastewater treatment plant, laboratory, etc.6. Test the DO(dissolved oxygen) value and temperature(/) of water.Pen-type intelligent dissolved oxygen analyzer, portable and easy to carry.7. ATC function (automatic temperature compensation), fast response time and automatic calibration.8. Test the DO(dissolved oxygen) value and temperature(/) of water. Large battery capacity, bulit-in 3.7V/1000mAh lithium battery.9. Pocket size, lightweight with backlight \u0026 large LCD display for clear and easy reading. Pen-type intelligent dissolved oxygen analyzer, portable and easy to carry.Specification:Specifications:Material: ABS PlasticItem Name: Pen Type Dissolved Oxygen MeterDisplay: Large LCD Display with Switchable BacklightRange: Dissolved Oxygen: 0.00 to 20.00 mg/LTemperature: 0 40 (32.0 104)Response Time: 30 secondsResolution: Dissolved Oxygen: 0.01 mg/L Temperature: 0.1(0.2) Accuracy: Dissolved Oxygen: 0.4 mg/LTemperature: 1Salinity Compensation: YES(ppt)Pressure Compensation: YES(mmHg/KPa)Automatic Temperature Compensation: 0 40 Working Temperature: 0 40 (32 104)Working Humidity: 85%RHPower: 1* 3.7V/1000mAh lithium batteryCharging limited voltage: 4.2VAuto Power off: 5 Minutes without any operatingData Hold: YESLow Battery Indication: YESTemperature Unit: / SwitchableItem Size: Approx. 140 * 43 * 43mm / 5.5 * 1.7 * 1.7inItem Weight: Approx. 132g / 4.6oz.Package List:1 x Dissolved Oxygen Meter2 x Spare Probe Protective Cover1 x Storage Bag1 x User Manual1 x ElectrolyteNote:Reagent Na2SO3 and CoCl2 are NOT included! Customers can buy the reagent by themselves.