Product Description MD-5008 metal detectors, 3-3.5m depth of detection, adopt advanced technique and attach high quality components which have features of ground balance, good discrimination ability, wide detection range, accurate orientation, strong resolution and easy operation . Features: 1 All-digital technology, brilliant, stable performance. 2 Simple balance to ground operation,can reduce the mineralization reaction of the detector when it is detecting metal. 3 Can identify the non-ferrous metals effectively. 4 Headphone Jack: Provide headphone connection. 5 Waterproof Search Coil: Could be used in the shallow water area.(Notice the mainframe is not waterproof.) 6 Straps-host ,Armrest and Stem: Designed to reduce the stress on forearm after holding the detector for long time . Applications: Military affairs Security detect Public security Criminal sector : Quick search Exam metal in the material, fuel and food Detect metal in the post and baggage Detect the pipeline and cable which under ground Archeology and Prospect Dig out the gold or silver treasure and metal cultural relic Technical Parameter: Power supply 8pcs 1.5V battery (6AA size required,not including) Sensitivity small coil: 25~30cm (for a us quarter) big coil:35~40CM(for a us quarter) operation modes Ground balance, DISCRIM Coil 10"and 13" waterproof search coil Audio One-tone audio Detected indication Visual: Lever Meter Sound:2"speaker or earphone (earphone not including) Battery Condition Indicator yes Frequency Emitting FRE: 6.99 khz Signal FRE: 437khz Distinguish ferrous and non-ferrous Warranty 1 year Weight 2.87KGS