The TRMS AC DC Clamp Meter by VIOT is a versatile digital multimeter with a current range of 1 to 600 amp, suitable for both AC and DC currents. This ammeter comes with a type K thermocouple for temperature and test leads for voltage resistance and others, making it perfect for HVAC systems. It features auto-ranging, auto-off, and a current clamp, ideal for quickly and accurately measuring currents in various circuits. The model C9 is designed for professionals in the business and industrial sectors, offering reliable and efficient testing capabilities.