The SC640 clamp meter is packed with more features and measurements than any clamp meter in the HVACR industry. The loaded SC-640 features lead storage, a swivel head, test lead holder, heavy duty magnetic strap, jaw flashlight, and a backlight on the dial so you can easily choose the right measurement in poorly lit spaces. Plus the SC 640 hosts all the electrical measurements HVACR pros use everyday, along with features like True RMS, Inrush current, capacitance, temperature, duty cycle, and microamps DC. The top-of-the-line SC640 clamp meter helps HVACR professionals do more everyday.