... * Range: 0 to 14.00 pH* LCD indicates both pH & Temp.* Pen type digital pH meter, all in one, pH electrode is included, easy to use* ... a set of pH 4.01, pH 7.00, pH 10.01 buffers*Microcomputer circuit, intelligent function, high accuracy* Easy to ... change the pH electrode* Compact size, light weight* Options temperature ...