Китай производит MD-730 импульсный индукционный детектор металла глубокий золота и охотник в подземных

This short, hand held pinpointing metal detector is perfect for use in conjunction with a full sized under water metal detector. Use this device to quickly zero in on the targets you have located in the hole. The Vibra-iking 750 will speed up your target recovery.
The Vibra-iking communicates to the user with pulses of vibration and bright light. The unique sealed design is waterproof to a depth of 100 feet and the self calibrating microprocessor controlled circuitry requires no adjustments of any kind.
The 730 incorporates Pulse Induction (PI) technology. This allows hunting in any environment including grass, mud, dirt, sand, black sand, and fresh or salt water.
Product Dimensions 18.2 x 4.1 x 3.8 inches

Applications: 
 It's a great all around metal detector for diving, snorkeling, or searching small areas.

Excellent function:
Pulse Induction (PI)
Tilt on & off
Communicates with vibration and light
Automatic Calibration
Waterproof - Submersible up to 100 feet (30 meters)