Features: The PH meter has a four-in-one function, which can measure PH,TDS,EC and TEMPERATURE with high precision at the same for time. Omni-directional measurement of water quality to ensure the for health of water With high sensitive probe, you can quickly read the results; wide measurement range and high resolution assurance that you can measure different kinds of liquids. Easy to use. Just dip the electrode in the solution then press and hold the MODE / CAL button for 6 seconds after the readings to stabilize(usually 5~10 Seconds) and it will automatically calibrate. Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, swimming pools and other water systems. Pocket size, lightweight and portable with switchable backlight and large LCD display for clear reading. Specifications: Range: PH:0.00~14.00pH,EC:1~19999us/for cm,TDS:1~19999ppm,TEMP: 0~60.0/32.0~140.0 Resolution: pH:0.01pH,EC:1s/for cm,TDS:1ppm.TEMP:0.1 Accurac: pH:0.01pH,,TDS:2%,EC:2%, TEMP:0.5 Temp CompensationAutomatic temperature compensation: (0~60) Material: ABS Battery:3 Piece 1.5V Button Bateries Color: (As Pictures Shown) Size: Approx. 4.5cm/1.77in Weight: Approx. 35g Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 Piece Electrode Probe ( 3 Pieces Button Batteries Not Included )