Check the listing for details. Power Probe PPTM01AS Pro Series The Maestro Circuit Tester. Condition: New. Listed at 416.46 USD. The Pro Series Maestro™ is the first tool in a line specifically designed for professionals. It offers powerful multimeter functions, advanced diagnostic modes, an easy-to-read color LCD display, and a rugged dust and water-resistant housing. This tool is built to withstand demanding environments and provide years of trouble-free testing, Power Probe testers have distinct advantages over conventional test lights or multimeters for circuit testing. Their unique configuration allows for enhanced functionality and convenience, making them a preferred choice for professionals, The Maestro™ features a trace mode that offers scope-like functionality. This enables technicians to analyze and track electrical signals in circuits, providing valuable insights for diagnostic purposes, The tool include.