• --High precision: After the measured value stabilizes, simply press the HOLD/TEMP button to lock the measured value and take it out for viewing, which is very simple.
• --Large display screen: The tester has a backlit LCD, which can help you clearly see the measurement results in any situation.
• --Automatic power off: The automatic power off function will turn off the power after 5 minutes of inactivity to save power. Using fully transparent liquid crystal (LCD) to display 4-digit numerical values and corresponding physical quantity units.
• --Automatic temperature compensation: The range of the digital hydroponic pH meter is 0 u00b0 C-60 u00b0 C (-0-140 u00b0 F), and automatic temperature compensation ensures that you obtain the best reading, so you can rest assured to test in any environment.
• --Wide application range: This instrument can not only detect the salt content of edible salt, saltwater tanks, and fish ponds, but also detect the salinity of seawater and saltwater fish tanks, and test the pH value of drinking water, swimming pools

Description:
Name: water tester
Color Beige+Blue
Material ABS
Size 183x37x37 mm (7.2x1.5x1.5 inches)
Waterproof grade TP67
Display supports backlight
Battery 3 x 6f22 9V carbon zinc battery (included)
Temperature Compensation Automatic Temperature Compensation (ATC)
Power consumption 2.9ma
Five in one function, high-precision, automatic power outage display, backlight, ATC
5-in-1 water quality tester for pH, salinity, temperature measurement, TDS, EC
TDS measurement range 0-200000 ppm
EC measurement range 0-200000 us/cm
PH measurement range 0.01-14.00PH
Salt water meter measurement range 0.00-25.00%
Temperature measurement range 0 ° C-60 ° C (-0-140 ° F), temperature conversion function
Packing list:
1 x water tester
Note:
Different displays may cause the color of the item in the picture a little different from the real thing. 
Manual measuring,please allow 1~3mm error,thank you.