brand new and high quality 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 x10image, Factory calibrated TDS Meter only,other accessories demo in the picture is not included Specification: Item Name: TDS Meter Material: Plastic Display: LCD Digital Accuracy: +/- 2% Range: 0-9990ppm Power Source: 2 x 1.5V battery (not included) Product Size: approx. 15.6x3x2cm/6.14x1.18x0.79'' Color: Light Gray Quantity: 1 Set Note:1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x TDS Meter 1 x Manual