TDS Meter Tester Features:

*This item can be used in: water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics.
*Hold function: Saves measurements for convenient reading and recording.
*Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteries.
*Dual range: Measures form 0-999ppm, with a resolution of 1ppm. From 1,000 to 9,990ppm, the resolution is 10ppm, indicated by drinking * 10image, factory calibrated.

*Color: As pictures show

*Accuracy: +/-2%

*Rang: 0-9990ppm

*Power supply: 2pcs 1.5V button batteries(Not Included!)

*Dimensions: approx. 155* 28*15mm/6.1* 1.1 * 0.6 inch