We can say a lot about the Detech EDS Plus II VLF Metal Detector, but we’ll say just this: annoyingly simple and terribly efficient. It does exactly what a professional metal detector should do. Specifications: Microprocessor controlled Very sensitive to small targets Detects all types of metals and has different discrimination modes Operating frequency: 14 kHz in dual channel (13.89 kHz and 13.74 kHz) Detector type: VLF (Very Low Frequency) Ground balance: auto and manual Audio frequency: 570 Hz Weight: 1.4 Kg with the 9″ (23 cm) coil Operational length: 130 cm Minimum operational length: 104 cm Available coils: SEF Pro 9 x 9″ (230 mm x 230 mm), SEF Pro 12 x 12″ (305mm x 305mm) and DD 6″ (150 mm) 1/4″ headphone jack (can use a 3.5 mm jack with an adapter)  Impedance 8-32 ohm Low battery alarm Works with 4 AA batteries or rechargeable batteries Warranty: 2 years The package contains: Control box Ergonomic 3 segment shaft 220 VAC AA battery charger One, two or three coils, depending on buyer choice User manual WARNING: After the Paris attacks, the export regulations were modified in that manner that we cannot send batteries together with the metal detectors anymore. Thus, the packages with VLF metal detectors will contain the charger for the Ni-Mh rechargeable batteries but they will not contain the batteries anymore.