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And then improve your whole body posture during work or life
Remote control
2 sets screen protector
Pixels:320*240 RGB
Requires 3 AAA batteries (not included)
Digital PH Meter Tester Pen with ATC and LCD Monitor Dell And then improve your wholeDigital PH Meter Tester Pen w ATC and LCD Monitor This digital pen style pH meter is an ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. PH value of 4 is a neutral, Less than 4 is acidic(The Smaller the acidic stronger),Greater than 4 is an alkaline(The stronger the alkaline greater). Pen type digital PH meter LCD indicator panel Power on off power switch Small size, light weight, easy to carry