Digital display. Pocket sized. Automatic temperature compensation. Lightweight. Electrode extends to 3.15 in. Range: 0.0 to 20.0 EC. Size: 6.2 x 1.5 x 1.3 in. Power: 1 9-volt battery. Weight: 4 oz. Includes: Hard Carrying Case. Calibration Solution. Calibration Screwdriver. Battery.