3D Professional Metal Detector Remote Metal Detector Metal Detector Technical parameters: Search system: microcomputer processor control and reflective conductivity Search range: 800 meters Detection depth: 14 meters Energy source: 12V 1600mAh Transmission frequency: 5.6--6KHz Signal frequency: 360--440Hz Weight: 2.5KG Detection type: gold, silver, copper, precious stones Charging method: The instrument has been installed with rechargeable batteries, directly into the charger, you can charge, charging time 10-12 hours. Off to open. In accordance with the original genus above the transmitter to choose the metal category can be detected.