Product Features:
1.ACCURATE AND RELIABLE: Equipped with high quality titanium alloy probe for high accuracy, reliable automatic temperature compensation (atc) ensures readings are always accurate at all temperatures.
2.Simple and instant: simply switch on the ph meter and gently shake the water, then a stable reading will be displayed on the lcd in seconds, if not operated for more than 5 minutes, the tds ppm meter will automatically switch off.
3. hold function and auto off function: freeze the measurement to view it out of the water. Switch off the meter after 5 minutes of stopping use to save battery.
4.WIDELY USED: Pocket tds ph meter is an ideal test kit for home and laboratory use. Great for testing water, swimming pools, aquariums, spas, hydroponics, food, wine and brewing.

9908 Red, Tds/ph/ec/thermometer 4 in 1
Measuring range: ph:0.00-14.00ph; tds:0-19990ppm; ec:0-199s/cm
Resolution: 0.01 ph; 1ppm; 1s/cm; 0.1 ℃; 0.1 degrees Fahrenheit
Accuracy: ph:+/-0.01 ph; tds/ec:+/-2%; Temp.
Battery: 3*1.5v lr44 button battery (included)
Temperature: 0.1-60.0°C; 32.0-140.0°f
Calibration: ph: 3-point auto calibration (6.86&4.00&9.18ph); tds:1413s/cm; ec:1413/s/cm
Auto Power Off: 5 minutes

Packing list:
1*test pen
3*Test powder
1*Instruction manual
1 box of button batteries

Notes:
Due to manual measurement, small errors are allowed. Please make sure you don't mind before buying.
The colour may be different from the colour on the display, please understand.