Model Number: ez-9909<br> Display Type: Digital<br> With Backlight Or Not: YES<br> Multi-functional water quality tester<br> Conductivity measurement range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms/cm. accuracy: ±2% of the reading<br> TDS measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPT<br> Salinity measurement range: 0.00 to 25.00% resolution: 0.01%<br> PH measurement range: 0.01-14.00pH, resolution: 0.01pH, accuracy: ±0.05pH<br> Colour:As shown<br> Material:plastic<br> Package Contents:<br> 1 x 5 in 1 Water quality tester(with backlight)<br> 1 x English manual<br> Only the above package content, other products are not included.<br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.