VICTOR VC3285 Digital Power Clamp Meters The total power of three phase measurement Phase sequence measurement MAX/MIN HOLD Data recording: 500 PC communication: Infrared isolation USB Auto power-off LCD Backlight Jaw opening: 55mm Size: 30010640mm Weight: About 650g Power Supply:4AA Alkaline batteries(not include) Power waste: No backlight:385mW Turn on the backlight:725mW