Specifications Application: Gold Prospecting (Waterproof coil to 3ft) Technology: ZVT Frequency/Transmission: Zero Voltage Transmission (ZVT) Coil (standard): 14" x 13" Super D Configuration with skidplate (waterproof to 3 ft) Audio Output: 1/4" non waterproof socket, Wi Stream wireless signal transmission Headphones Supplied: KOSS UR 30 100 ohm with 6.3 mm plug (1/4 inch) (non waterproof) Visual Display: Full colour LCD (320 x 240 pixels) Backlight: Yes USB Connectivity: USB interface for XChange 2 PC software Detect Modes: Gold Mode (High Yield, General, Extra Deep) Ground Type (Normal, Difficult, Severe) Discrimination: All Metal Audio tone: 1 100 Ground Balance: Auto and Manual (Quick Trak trigger button) Sensitivity Adjust: Level (1 20) Tune / Noise Cancel: Auto and Manual (256 channels) Threshold: Level (1 50) Pitch (1 100) Target Volume Adjust: Range (1 20) Limit (1 20) Battery: LiIon Rechargeable Pack (7.2V DC, 72Wh) Low battery alert: Yes