Features: - Rugged design for handheld or bench top use, neckstrap for "hands-free" operation. - Large 3-1/2 digit LCD built into adjustable "flip-up" cover. - Wide measuring range from 10 to 19,990 uS/cm for conductivity or 10 to 19,990 ppm for TDS. - Calibrate for changes in cell constants via a cell adjust.