Model:GPX-4500F Main features High-brightness LED panel can generally displays the detected metal type according to the signal strength. The all-metal detection mode is suitable for searching metal objects on the ground,and can be simple recognition of metals. In addition to LED panel display,it can distinguish metal type by tones 9.5-inch disk waterproof probe that can detect in the shallow water. Equipped with an external headphone jack,connected to a single-channel headphones (headset-owned),easy to use,built-in high-capacity rechargeable battery, a low-voltage t function,with charger,worked continuously for more than ten hours when full of power. Specification Depth: 1.5-3.5m Signal Frequency: 9.6KHZ Audio Frequency: 400KHZ Power Supply:DC12v(Built-in rechargeable battery) Power consumption:0.8w Connecting Rod Length:1.3m Coil dimension:40cm Net weight: 2.6 kg Gross Weight: 7.5kg Package Size: 600*360*160mm Warranty : 12 month