1. This instrument can check cable break points, find short-circuit cables, and identify and track wires without damaging the insulation. 2. This instrument consists of a transmitter and a receiver. 3. 0.138 inch (3.5mm) plug headset enhances audlble effect in noisy environment. 4. 9.76 inch (24.8cm) long probe make operation more convenient. 5. Easy to operate. 6. Power supply: 9V battery, not included
