Features:This product is made of high quality materials and is durable and resistant to damage.With an oversized display, data can be clearly displayed for accurate water quality testing.Suitable for continuous monitoring and display, suitable for aquarium, aquaculture, laboratory, chemical reaction, water treatment, etc.Both AC and DC are available, and the power adapter is available upon request.Especially suitable for fish container water quality measurement.Continuous monitors use micro-processing technology to provide many reliable, super-friendly features.The display is designed for long-term, low-maintenance use.Specifications:Condition:100% Brand NewMaterial: PlasticColor: As shown in the pictureSize: As shown in the pictureStyle: EU 220V, US 110V(Optional)Range: -1999~1999mVResolution: 1mVAccuracy: 5mVDisplay: LCD, 4 digitsWorking temperature: 0~50CPower: DC 6V with adapterBattery: 4*1.5V (AG13) battery (Not included)Package List:1*User Manual1*ORP Meter1*Bracket1*Adapter1*Rubber Sticker1*Small Screwdriver.