This pipeblockage tester tool set, can accurately locates invisibleblockage, clogging inside the pipesand reminds you with a buzzing sound. Working method: According to the signal strength to determine the location of the blockage. S-tronger signal with louder alarming sound. Equipped with signal indicator, the signal is s-tronger, the red light with higher brightness. IP67 waterproof probe, this detector can be used to detect wall studs, metal pipes, PVC pipes and even water pipes. You can have a try. Features: Working method: According to the signal strength to determine the location of the blockage. S-tronger signal with louder alarming sound. Equipped with signal indicator, the signal is s-tronger, the red light with higher brightness. IP67 waterproof probe, this detector can be used to detect wall studs, metal pipes, PVC pipes and even water pipes. Easy storage, turn counterclockwise to fold the signal wire easily, saving space. It can accurately locates invisibleblockage, clogging inside the pipesand reminds you with a buzzing sound. Adjustable sensitivity, the receiver can increase the sensing ability to the emitter by adjusting its sensitivity. Equipped with a USB cable and lithium battery, it is convenient to be charged by computers or c-hargepal. Specifications: Name: PipesBlockage Locating Tool Set Material: plastics Color: red and black Emitter specification: Scope of application: PVC pipes, plastics pipes, cement pipes, iron pipes, metal pipes Model: NF-5120(20m), NF-5130(30m), NF-5140(40m) (optional) Working frequency: 300Hz Work hours: 10H Working temperature: 0-40 Battery: 3.7V, 2600mAh battery(included) Receiver specification: Distance Range: 0-0.6m (Metal pipes) 0-0.15m (Non-metal pipes) Sensitivity adjust: YES Working frequency: 300Hz Work hours: 20H Battery: 3.7V, 1400mAh battery (included) Item size: Receiver: 360 x 65 x 40mm or 14.17 x 2.56 x 1.57in Emitter: 360 x 300 x 45mm or 14.17 x 11.81 x 1.77in Package size: 400 x 360 x 75mm or 15.75 x 14.17 x 2.95in Package weight: NF-5120(20m): 1755g or 3.87lb NF-5130(30m): 2400g or 5.29lb NF-5140(40m): 2500g or 5.51lb Packing List: 1 x Emitter 1 x Receiver