Oakton pH 150 Waterproof Portable pH/mV/Temperature Meter with Power Supply

Good, Working Oakton pH 150 Waterproof Portable pH/mV/Temperature Meter with Charging Power Supply. 0.1 mV for ±999.9 mV; 1 mV beyond ±1000 mV. Waterproof Portable Meter; Meter Only.