Features:1. Backlight design: Large LCD screen design with backlight for clear display and more convenient to read. Insert the electrodes of the tester into the soil and waited for a few seconds to get the data on the LCD screen. 2. Highly sensitive probes: Adopting alloy electrodes for higher sensitivity and durability. Turn on the tester, insert the probe into the soil for 5cm and the measurement data be displayed after about 3 seconds. Wipe the electrode after measurement to keep it clean. 3. Lock button: After the value is stable, click the hold button to lock the current value. If you need to re-measure, please the hold button again. 4. Wide range of applications: Can be used for Potted planting, Scientific experiment, Orchard planting, Grassland and pasture, Agricultural planting, etc. experiment, Orchard planting, Grassland and pasture, Agricultural planting, etc. Specifications: Screen: LCD backlight display Single tester Power supply: 3* 1.5V LR44 button cell (No including) Measuring depth: 3-13.8cm Nitrogen measurement range: 0-1999mg/kg Phosphorus measurement range: 0-1999mg/kg Potassium measurement range: 0-1999mg/kg Temperature measurement range: -30°C-80°C Colour:white & green Material:ABS+metal The actual product may have slight color difference or difference, which not affect the use Package Contents: 1 * nitrogen tester 1 * phosphorus tester 1 * potassium 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.