Usage Tips:[SPEED and ACCURACY] Integrated with the est sensor and durable probe, let you get data in seconds. Just in about 1 inch of water instantly you get the reading. Also upgraded with big backlit LCD make reading easier! [EASY TO USE] Our 3-in-1 TDS meter is an easy-to-use a hand- digital meter to instantly check your overall water quality. It allows you to stay on top of your drinking water quality at all times! A compact design with a case bonus can let you take it anywhere you need [MULTIPURPOSE and MUST-HAVE FOR ] Worry about water quality The TDS meter is a great water quality test tool for drinking water, and purification systems such as systems or DI systems, aquariums, hydroponics (test nutrients), pools and spas, commercial and industrial applications, and more [INTEGRATED 3 TEST, TDS EC and TEMP] Three different measurement needs can be fulfilled by one water tester meter. Not only be convenient , but also saves your time and money, absolutely a helpful water test kit for your water safety . [NOTE: EPA suggests that the TDS of drinking water should be 500 ppm] [AUTO-OFF AND HOLD FUNCTION] The TDS tester shuts off automatically after 2 minutes of non-use to conserve batteries. Features a hold function that saves measurements for convenient reading and recording Colour:White Material:plastic Package Contents: 1 x Water Quality Tester Only the above package content, other products are not included. 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.