Features: 1. Used to measure the oxidation reduction potential (ORP) level and temperature (C° / F°). 2. Dual function, can measure the ORP and temperature. 3. Compact and portable pen design,easy to operate and storage. 4. Waterproof rating IP65, replaceable sensor probe. 5. Large and clear LCD with backlight, easy to read and accurately measuring functions. Specification: The water quality monitor is the useful tool for testing PH/EC/TEMP of solution level. It looks like a pen, the portable size is good for carrying. Suitable for water sources, aquarium, hydroponics, laboratory and scientific testing, spas, swimming pools and other water systems. Feature: Used to measure the oxidation reduction potential (ORP) level and temperature (C° / F°). Dual function, can measure the ORP and temperature. Compact and portable pen design,easy to operate and storage. Waterproof rating IP65, replaceable sensor probe. Large and clear LCD with backlight, easy to read and accurately measuring functions. Suitable for water sources, aquariums, hydroponics, spas, swimming pools and other water systems. Speciation: Range: - 1999mv ~ 1999mv Temperature range: (70 - 58 ° F ~ 158 ° F) Resolution: 1mV 0.11°C (0.2°F) Accuracy: ±5mv; ±1°C (±2°F) Operating temperature: 0 ° C ~ 50 ° C (32 ° F ~ 122 ° F) Battery: 4 x 1.5v (ag-13) button battery (Not included the battery) Material: ABS Color: Yellow Size: 190 x 37 mm / 7.48 x 1.46 inch (appr.) Screw driver length: 95 mm / 3.74 inch (appr.) Package included: 1 x ORP/TEMP Meter 1 x Screw Driver 1 x Manual Package List: Features Accurate Measurement: Measure the oxidation reduction potential (ORP) level and temperature (C° / F°) with precision using the 2in1 Digital ORP/TEMP Meter Tester. Dual Functionality: This versatile meter can measure both the ORP and temperature, providing comprehensive monitoring for your aquarium, pool, or hydroponic system. Portable and User-Friendly: The compact pen design makes it easy to operate and store, allowing you to conveniently monitor your water quality wherever you go. Durable and Waterproof: With an IP65 waterproof rating and a replaceable sensor probe, this meter is built to withstand various aquatic environments, ensuring long-lasting performance. Clear and Easy Readout: The large LCD with backlight provides a clear and legible display, allowing you to easily read and accurately measure the ORP and temperature levels.