Multi parameters Portable Meter, pH, mV, Temperature, Conductivity & TDS, & Salt. Lightweight and ergonomical, with waterproof housing, Large LCD display. Supplied complete in a carring case, with instruction manual and calibration buffers set. pH Range: -2.00 / 16.00 pH ; Temperature Range: 0 / 90°C ; mV Range: 1000 / 1000. Conductivity Range: 0 / 2000 us and 2.00 / 20.00 ms ; TDS Range: 0 / 1300 ppm ; Salt Range: 0 / 1000 ppm. Isolab Germany