Feature: 1. Working method: According to the signal strength to determine the location of the blockage. 2. Stronger signal with louder alarming sound. 3. Equipped with signal indicator, the signal is stronger, the red light with higher brightness. 4. IP67 water resisting probe, this detector can be used to detect wall studs, metal pipes, PVC pipes and even water pipes. 5. Easy storage, turn counterclockwise to fold the signal wire easily, saving space. 6. It cab accurately locates invisible blockage, clogging inside the pipes and reminds you with a buzzing sound. 7. Adjustable sensitivity, the receiver can increase the sensing ability to the emitter by adjusting its sensitivity. 8. Equipped with a USB cable and li battery, it is convenient to be charged by computers or power bank. Specification: Specifications: Name: Pipes Blockage Locating Tool Set Material: plastics Color: red + black Emitter specification: Scope of application: PVC pipes, plastics pipes, cement pipes, iron pipes, metal pipes Working frequency: 300Hz Work hours: 10H Working temperature: 0-40℃ Battery: 3.7V, 2600mAh battery (included) Receiver specification: Distance Range: 0-15cm (metal pipe); 0-40cm (non metal pipe) Sensitivity adjust: YES Working frequency: 300Hz Work hours: 5H Battery: 3.7V, 1400mAh battery (included) Item size: Receiver: 360 * 65 * 40mm / 14.17 * 2.56 * 1.57in Emitter: 360 * 300 * 45mm / 14.17 * 11.81 * 1.77in . Package List: 1 * Emitter 1 * Receiver