Ceta Form offer a range of digital multimeters and clampmeters, ideal for the electrician and auto/maintenance engineer. Ceta Form Digital Clampmeter (AC Current-Auto Ranging). MAX/MIN mode, data hold, clamp jaw lighting, backlit display, REL mode, frequency/duty cycle, auto power off and warning functions, anti-high voltage circuit design, 600V CATIII, large LCD display, 2xAAA batteries.