The Klein Tools CL900 True-RMS Digital AC/DC Clamp Meter, 1000V AC/DC, 2000A, Auto-Ranging is an auto-ranging, True-Root-Mean-Square (TRMS) digital clamp meter that measures AC/DC current via the clamp and measures AC/DC voltage, resistance, continuity, frequency, dutycycle, capacitance, and tests diodes via test-leads. It features a Low Impedance (LoZ) mode for identifying and eliminating ghost or stray voltages, and has a dedicated mode for capturing Inrush Current. The backlit display offers clear visibility in environments with low ambient lighting.