Please note: the physical slightly color difference or difference,does not affect the use, please do not mind, thank you Fermented Food pH Tester - The pH testing range of the pH meter for food is 0.00-14.00, with an accuracy of 0.1. The proprietary spear pH probe helps you accurately test the pH of a wide of foods during fermentation, such as sausage, salami, cheese, sushi rice, canned jams, fermented sauces, chili sauces, hot sauces, and more. Food pH Meter - The food pH tester is designed for highly accurate pH testing of soft solid samples, simply insert the spear probe into the sample and wait for the value to stabilize for an accurate measurement, perfect for a wide range of items such as cheeses, sushi rice, meats, fruits, doughs, jams, sauces, skincare products and solid media. Product parameters 1, pH range: 0.00-14.00pH pH resolution: 0.01pH pH accuracy: 0.05pH 2, Temperature range: 0.1-60; 32-140. 3, Automatic temperature compensation: 0.1-60. 4,Operating environment: 0.1-80, RH: max90%. 5, Waterproof grade: IP67 6, Battery: 3 x 1.5V (LR44); low battery warning Color: yellow material: plastic Package Contents: 1 x ph meter 5 packets of calibration powder 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.