Model Number: ez-9909Display Type: DigitalWith Backlight Or Not: YESMulti-functional water quality testerConductivity measurement range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms/cm. accuracy: 2% of the readingTDS measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPTSalinity measurement range: 0.00 to 25.00% resolution: 0.01%PH measurement range: 0.01-14.00pH, resolution: 0.01pH, accuracy: 0.05pHColour:Material:plasticPackage Contents:1 x 5 in 1 Water quality tester(with backlight)1 x English manualOnly the above package content, other products are not included.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.Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 261 hours Hope you have a pleasant shopping experience!