Detects and alerts you to short and open circuits * 20" power lead reaches throughout the vehicle * The 2 main tools are the Smart Transmitter and the Smart Receiver and the set comes with adapters that make connecting to any circuit quick and easy * You can also wiggle and flex wires or connectors to detect intermittent circuit conditions * The Smart receiver"s sensitivity adjustment keeps you on the right circuit and ignores the unnecessary weaker signals , Includes: transmitter. receiver, 3 fuse adapters, 1 universal adapter, blade probe, back probe, piercing probe, 2 AAA batteries, 15 minute instructional video, instruction booklet and carrying case.