Power supply:1.5 V*8 battery(not including) Sensitivity:>25 cm (for a us quarter) Operation modes:Fully automatic and all metal detectors1 Coil:15" waterproof search coil Distinguish:Ferrous and non-ferrous Audio:1 tone audio Detected indicatio:View meter Size Unit:50*21*48 cm Weight Unit:6 kg Warranty:12 Months