Handheld Metal Detector Underground Gold Finder Pinpointer for Outdoor Item Type: Handheld Metal Detector Maximum Detection Depth: Approx. 15m / 49.21ft. For an object of 5 x 5cm, this instrument can detect at least 3 meters. For an object of 30 x 30 cm, it can detect 3-6 meters. If an object of this size is buried for a long time, it can get to 15 meters. The larger the area of the object, the deeper its detection depth will be. Function: 1. It can accurately determine the buried position of the object and can locate it. 2. It can also rely on the frequency regulator to identify the specific type of metal. Search System: Microcomputer processor control and reflection conductivity. Search Range: Approx. 1000m / 3280.84ft Battery: Transmitter: 1 x 12V 18650 1600mAh rechargeable lithium battery, shipped with built in battery. Receiver: 1 x 12V 18650 1000mAh rechargeable lithium battery, shipped with built in battery. Transmission Frequency: 5.6-6KHz Signal Frequency: 400-470MHz Detection Type: For gold, silver, copper, etc.