Metal detectors Multi zone metal detectors Auto calibration Human safe vlf detection technology Multi sensitivity levels, 246 adjustable sensitivity steps at each Metal density display at 10-level-vu meter with green, yellow, red led's Environment magnetic noise level display on lcd screen Standard uninterruptible power supply(ups) enabling 4 hours operation without mains Nilecj-0601 security level 1-5/ ip50-55/ iec 348/ en60950 class1 Conformity ce norms en 61000-6-3, en 61000-6-1 and produced under iso 9001:2000 qms Modem and rs232 output for src-scada remote data communication Certificate approved "safe for wearers of peacemakers and pregnant woman"-no effect to magnetic media