The pen ORP meter is professional and tool for testing your water level. Suitable for aquarium pool and environment water.

Features:
Use to measure the amount of Oxidation Reduction Potential (ORP) level.
The tendency of the solution to either gain or lose electrons.
Clear LCD with backlight.
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:
Color: Yellow
Material: ABS
: -1999mV ~ 1999mV
Resolution: 1mV
Accuracy: ±5mV 
Operating Temperature:  0℃ ~ 50℃ (32°F ~ 122°F)
: 2 × 3V(CR1632) Button Cell (not included)
Item Size: 14.8 * 2.6 * 1.4cm / 5.8 * 1.0 * 0.6in
Item Weight: 37.4g / 1.3oz

Package List: E0922
1 * ORP Meter ( is not included.)
1 * User Manual
1 * Mini Screwdriver