Waterproof class: IP65<br>Working environment: 0-60°C(32.0-140.0°F) RH: 100%<br>Backlight: LCD screen backlit display<br>Automatic shutdown: Five minutes<br>Electric cell: 3*1.5V(LR44) (Not included)<br><br>Screen size: 28x20mm<br>Display mode: Liquid crystaldigital display<br>Notes: The electrodes needto be cleaned after use<br>pH<br>Measuring range: 0~14.00pH<br>Resolution: 0.01 pH<br>Accuracy: ±0.01pH<br>Temperature compensation: 0~60℃(Auto)<br>ORP<br>Measuring range: ±1999mV<br>Resolution: 1mV<br>Accuracy: ±2mV<br>CL2<br>Measuring range: 0.01~4.00ppm (Total residual chlorine)<br>Resolution: 0.01ppm<br>Accuracy: ±10% reading value, ±0.01ppm<br>Temperature compensation: 0~60℃(Auto)<br>H2<br>Measuring range: 0~10000ppb (0.001~10.000ppb)<br>Resolution: 2ppb (0.002ppb)<br>Accuracy: ±10ppb (±0.01ppb)<br>Temperature compensation: 0~60℃(Auto)<br>TEMP<br>Measuring range: 0~60℃<br>Resolution: 0.1℃<br>Accuracy: ±0.1℃<br>Colour:Red<br>Material:plastic<br><br>Package Contents:<br>1 x Chlorine Testing Pen 5-in-1<br><br>Only the above package content, other products are not included.<br>Note: Light reflection 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.