The REED R3525 pairs a cabled pH/mV electrode with a compact meter body, suited to both handheld use and wall mounting. It auto-recognizes standard buffer solutions during a 3-point calibration, displays pH or mV alongside temperature on its dual screen, and runs off a 9V battery or optional AC adapter with a 10-minute auto shut-off. The -NIST edition adds a NIST calibration certificate on top of the standard bundle, which already includes the electrode, protective holster, pH 4/7 buffer solutions, a mounting suction cup, and battery.