QUARKJK Underground metal detector/Nugget finder/Gold detector/Treasure Hunter (5m detecting depth)

Description

Transmission Frequency: 6.99+-0.2KHZAudio Frequency:450+-10HzPower: about 2.5wPower Supply: 8pcs of 1.5v batteries/ rechargeable batteries(optional),available externalPower:DC12VAccessories: charger, headphones, external battery box, small coilsCoils Size :big coil (diameter 390mm)Small coil(diameter 300mm)Detect Security: big coil:40-45cm (1coin size as US 25 cent)Small coil:25-30cm (1 coin size as US 25 cent)Maximum detecting depth: big coil:5 mSmall coil 3.5m