Feature: 1. [Waterproof Probe] With waterproof probes, this pipe blockage detector is capable of handling various environments, ensuring long service life. 2. [Sturdy ABS Material] Made of sturdy ABS material, this pipe clog detector is impact resistant and scratch resistant, allowing for long term use. 3. [Beep Prompt] This detector could precisely position the pipe internal blockage, and provides beep prompt to remind you. 4. [Wide Applicability] The pipe scanner enables quick localization of any blockage or obstruction in pipes, preventing widespread pipeline clogging. 5. [Versatile Application] This pipeline blocking scanner comes with 4 probes, interchangeable for detecting steel, iron, PVC, and other types of pipes. Specification: Item Type: Pipe Blockage Detector Material: ABS Measurement Range: 20m Transmitter: Yes Receiver: Yes Sensing Range: 0-50cm Transmitter Power Supply: 1 x 3.7V 2000mAh lithium battery (built in) Receiver Power Supply: 1 x 3.7V 2000mAh lithium battery (built in) Full Charge Measurement Duration: About 8-10 hours. Package List: 1 x Transmitter1 x Receiver1 x Charging Cable4 x Probe Accessories Set