Features With titanium alloy probe, anti-rust and anti-corrosion, the measurement value is more accurate. 3 in 1 design supports TDS, EC conductivity and temperature detection Support 5 minute auto off function, reduce battery consumption Equipped with a high-resolution LED display, the values are easier to read and more precise. Water quality recognition pen, easy to measure water quality, compact and portable, long-term use Specifications: Item type: water quality detector Material: ABS, titanium alloy probe Model :A1 Function: TDS water quality detection, EC conductivity detection, temperature detection TDS measuring range: 0-9999ppm Temperature measuring range: 0.1-80 ℃ (32.0-176.0 ℉) Error: ±2% battery: 1pc 3V CR2032 button cell (battery not included) package list: 1 x water quality detector (battery not included) 1 x Manual Package List 1 x Water Quality Detector (Battery Not Included) 1 x Manual