... . 2.Test PH and salinity in soil 3.with printer Introduction:The soil nutrient tester can quickly test the N, P, K, humic ... , organic matter, salinity, and PH in the soil, fertilizerand plant2.With the function of time display, can automatically record and save ... current (AC): 80V~240V,50Hz; 2) Direct current: 18V,5W (With tester)The product picture for your reference.