DIGITAL PEN-TYPE REDOX TESTER ORP METER TESTER WATER TREATMENT MONITOR SPECIFICATION: • RANGE : -1999 MV TO 1999 MV • ACCURACY : ±5 MV • RESOLUTION : 1 MV • LCD DISPLAY : 4 DIGITS • OPERATING TEMPERATURE : 0 - 50C • CALIBRATION : BY MINI SCREWDRIVER (INCLUDED) • PACKING :1 X ORP METER 1 X MINI SCREWDRIVER 1 X INSTRUCTION MANUAL ORIGIN : GABY INSTRUMENTS DELIVERY : EXSTOCK