... * LCD with displays in both conductivity and temperature* Pen type digital conductivity meter, all in one, conductivity electrode is included, easy for ... factory* Compact size, light weight* Easy to change the conductivity electrode* Power supply by DC 1.5 V battery ... (LR44, BAT ) x 4 PCsDimension188 x38 mm * included conductivity electrode.Weight82 g (included electrode). digital conductivity meter