ORP-169F 4 Digital LCD Mini ORP Meter Monitoring Testing Equipment Water Quality Meter Features: This product is made of 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: Material: Plastic Color: As shown in the picture Size: As shown in the picture Range: -1999~1999mV Resolution: 1mV Accuracy: ±5mV Display: LCD, 4 digits Working temperature: 0~50°C Power: DC 6V with adapter Battery: 4*1.5V (AG13) battery (Not included) Package List: 1*User Manual 1*ORP Meter 1*Bracket 1*Adapter 1*Rubber Sticker 1*Small Screwdriver