The Snap-on Multi-Probe Ultra, No. EECT900, features circuit testing and digital multimeter functionality in a single handheld unit for 12V and 24V DC vehicles. The rear-facing LCD has a color-coded on-screen menu, single-function control buttons and audible smart-tones, for easier detection of AC and DC voltage, amperage and ohms. An AC meter displays peak-to-peak, pulse width, duty cycle, frequency and TRMS simultaneously. The unit has patented circuit breaker protected power-up, built-in vehicle battery status check, and the cable length makes checking distance circuits easy. An ergonomic handhold position allows for viewing live display results even if lying under dash.