This pen-style pocket Tester delivers accurate and reliable measurements of conductivity, TDS, and salinity. It's easy to use: simply press a button and dip the pen into the solution. The LCD gives you a quick measurement reading, alternating with temperature, available in both a live and hold measurement mode. Auto ranging to Select measurement range and single-point calibration features for KCl, NaCl and 442 natural water modes. Fully encapsulated electronics and a waterproof body constructed of anodized aircraft aluminum with protective coating provide excellent durability. What's included: Tester holster, lanyard, and 1.5 V n-type alkaline battery. Waterproof, pocket-sized meters for water analysis testing auto ranging to Select measurement range KCl, NaCl and 442Tm natural water modes automatic temperature compensation 0575405 PTBT1 offers Bluetooth for data transfer.