1. With the help of Yeipower you can find the invisible blockage and blockage in the pipeline easily. Solve Problem There are always many pipe blockage problems in life. But we do not have the most effective way to locate and solve. The pipe blockage tester developed by us can penetrate 40cm thick water pipes and walls to locate blockages. Improve work efficiency. Work Principle Pipeline blockage locator adopts the principle of electromagnetic induction.Strong signal penetration and precise positioning.Use Pipe blockage emitter and receiver to locate blockages in metal pipes, PVC pipes, water pipes and wall nails. Work Method Pipe blockage emitter to produce electromagnetic waves. Locate the blockage by the waterproof probe. Pipe blockage receiver receives electromagnetic waves. According to the strength of the signal. Generate buzzing sounds of different sizes to locate the blockage. Products Include Pipe Blockage Emitter x1 Pipe Blockage Receiver x1 Double Head Charging Cable x1 Headphone x1 Probe Accessories x6 Operating Instructions x1 Storage Bag x1 Lithium battery x2. Already equipped with all related products. Please rest assured. HassleFree Customer Service The product can only be used to find clogs in pipes. Cant be used to scan walls and find lines underground. If you have any questions about the use and product quality, please contact me. We will provide you with a satisfactory solution. Completely worryfree, add to the shopping cart immediately.