1Working Principle: The receiver has a built in induction coil to receive the magnetic signal from the pipeline. The coil generates an induction current to calculate the direction and position of the transmitter. 2Accurate Positioning: The pipe blockage detector adopts the principle of electromagnetic induction and can accurately locate the blocked place in the pipeline to facilitate maintenance. 3Strong Signal Penetration: The signal penetration of the pipe clogging scanner is strong, and the signal can penetrate the soil and brick wall, which is very useful. 4Durable: The underground pipel blockage detector is made of premium ABS material, which is sturdy and durable, and has a good touch when held in the hand. 5Fully Equipped: This pipeline blocking finder is equipped with a transmitter, USB cable, button battery and charging head, which is a complete set of equipment and easy to use. 1 x Detector1 x Launcher1 x USB Line1 x Button Battery1 x Charging Head1 x Instructions Item Type: Pipeline detectorMaterial: ABSWeight: Approx. 690g/ 24.3ozTechnical Parameters of Receiver:Receiver Frequency: 512HZEnergy Consumption: 3WDistance: About 5m/ 196.9inBattery: 3.7V 2600mAH built in lithium batteryLoader: 5V 1ALoading Time: About 6 hoursBattery Indicator: 3 gears, flashing when the battery is lowBattery Working Time: About 10 hoursSignal Strength: 6 gearsSpeaker: SupportDetection Mode: Vertical, nearVoltage: 100-240VTechnical Parameters of Transmitter:Transmitter Frequency: 512HZOutput Wave: Sine waveBattery: 1.5V LR44(Shipped with supporting battery)Transmitter Distance: About 5m/ 196.9in