Features Features: The PH TDS meter combo shell adopt ABS material with lightweight handheld design, easy to carry anywhere. With protective sleeve, lightweight handheld design, easy to carry. LED screen: High definition LED screen with automatic color change, make the result clearer. The PH TDS instrument cluster and HD LED screen support automatic color change to make the results clearer. It can also be used at night. Stable and Reliable: The PH TDS meter combo has complete measuring range, reliable and fast reading. Double stainless steel clips bring more stable connection, very stable and reliable Practical: The pH measurement accuracy for 0.01pH, and the TDS reading accuracy is controlled at ± 2%, which is very accurate. Each test pen uses 2 x LR44 button batteries, a total of 4 x LR44 button batteries are used(not include). Wide Application: The PH TDS meter combo suitable for aquariums, water purifiers, home drinking water, swimming pools, agriculture, aquaculture. Suitable for all home and laboratory TDS and pH testing applications. Specification: Item Type: PH TDS Meter Combo Product Material: ABS Clips Material: Stainless steel pH Meter: Test Range: 0.00-14.00pH Accuracy: 0.01pH Error: ±0.1pH TDS Meter: TDS Measurement Range: 0-9999ppm Temperature Measurement Range: 0.1-80.0℃ Conductivity Measurement Range: 0-9999 μs/cm Error: ± 2% (0-2000ppm), ±5% (above 2000ppm) Package List: 2 x Test Pen(pH pen + TDS pen) 3 x Reagent Powder 2 x User Manual 1 x Storage Box Package List 2 x Test Pen(pH pen + TDS pen) 3 x Reagent Powder 2 x User Manual 1 x Storage Box