DescriptionPi-iking 750 communicates with vibration and light pulses in the field of pinpointer handheld metal detector state, including pulse induction (PI) technology that is waterproof to a depth of 100 feet. The self - calibration microprocessor control circuit does not need adjustment. The unique seal design allows detection in any environment that contains grass, mud, dust, sand, black sand, or even fresh or seawaterFeature-Color: As Shown.- Material: plastic- Size: 42x11x11cm- Voltage : 9V- Measuring range 10m- Communicates with vibration & light - (When a target is located the Vibra-iking750 signals with pulses of vibration and flashes of bright from white L.E.D)- Pulse Induction Technology (PI) - (Allows hunting in salt water or in any type of soil, including black sand)- Detection depth stability - (New Advanced circuitry maintains detection distance throughout the life of the battery)- Target distancing - (The pulses of vibration increase in frequency as the probe approaches the target precision pinpointing)- Automatic tuning - (The state of the art microprocessor controlled design requires no adjustments of any kind)- Waterproof - (Fully waterproooffor 30 meters underwater . Best for seaking treasure undersea)