Certification:CE FCC Certification Material::ABS Plastic + Iron Detectable Indication:Audio / Alarm Buzzer Max Detection Depth:2.5m (2.5m (1*1m Aluminium board)) Operating Mode:Ground Balance / Identification Object Detectable:Ferrous / Non-ferrous metals Min Detection Diameter::3.5cm / 1.38 Power:1200mA li-Battery( include) Product Net Weight / Size:2380g / 30*30*123.5cm Sensitivity::detecting gold, silver, aluminum, copper, iron, and rare metals. Show More