... , PH, organic matter, soil PH, soil salinity, with storage and printing function, built-in the amount of nutrients needed for growth ... can provide guidance for fertilizing amount according to needs, with printing function Characteristic:Can quickly test N,P,K organic matter, ... . Power:Alternating current: 80V- 240V,50HzDirect current: 18V, 5W (With tester) With Printing Function Soil Nutrient Tester