The SAR-1 has both visual (ten ultra bright LEDs) and sensory (vibration) target indicators. When the detector approaches a metal object the handle begins to vibrate and a few of the LEDS illuminate. As the bright yellow search coil gets closer to the target, the vibration becomes more rapid and more of the high intensity red LEDs light up. The number of LEDs that illuminate is helpful determining the size and burial depth of the target. Small targets may only illuminate 2 or 3 LEDs whereas larger targets will light up the complete display.
The SAR-1 works equally well in fresh or salt water, and detects a variety of targets including shell casings, handguns, rifles, shotguns, knives, UXO, mines, and any type of explosive device containing metal. The unit will also detect large targets (such as automobile or aluminum boat) up to 6 feet.
Additional details are on JW Fishers direct site: http://www.jwfishers.com/products/sar1.html
Please call us with any questions.