Features:

• Apply in water sources， aquarium， hydroponics， spas， swimming pools and other water systems.
• Mini small size， easy to carry with.
• Compact and portable pen-type design.
• Easy to use and provides instant display of results.

Specifications:

• Range: 0~±1999mg/LmV
• Resolution:  1mV
• Accuracy :  ±5 mV
• Batteries :4 x 1.5V alkaline(Included)
• Environment: 0 to 50°C，RH 95% max;
• Calibration :1point
• Dimensions :175x41x23mm
• Weight :72g

package list:

• 1*ORP meter
• 1 * screw driver
• 1 * instruction manual