Introducing the test pen set, a versatile tool for accurate testing within a pH range of 0.01. With quick and stable readings displayed in seconds, this set includes a pH tester and a TDS meter. The pH tester provides water purity levels in PPM at the push of a button, while the soil meter helps control soil pH levels. Featuring automatic temperature compensation and sensitive electrode sensors, these meters deliver precise results with just a press of a button. The compact design makes them convenient for various applications, including testing drinking water, swimming pools, aquariums, spas, hydroponics, and more. The soil tester is perfect for plants, gardens, lawns, and farms, providing intuitive data in just 10 seconds. Upgrade your testing capabilities with the test pen set today! Item Name: PH Meter Material: Plastic Measurement Accuracy: 0.01 Power Supply Voltage: 1.5V/2 Battery: PH Meter: 2 x LR44 Button Batteries(Battery Included) EC Water Quality Test Pen: 1 x 3V CR2032Button Battery(Battery Included) Size Details: PH Meter: 15.5cm x 3.1cm/6.1" x 1.22" (Approx.) EC Water Quality Test Pen: 15.2cm x 3cm/5.98" x 1.18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x PH Meter 1 x EC Water Quality Test Pen 3 x Correction Powder