Treasure Products Vibra-Quatic 2 Pinpointer Waterproof - Unique sealed design can be used in almost any environment including fresh or salt water to depth of 100 feet. This makes the Vibra-Quatic 2 an ideal tool for divers. Detection depth stability - New advanced circuitry maintains the unit's detection distance throughout the life of the battery. Communicates with vibration & light - When a target is located the Vibra-Quatic 2 signals with pulses of vibration and flashes of bright blue light. Tilt On/Off - No push button switches. The Vibra-Quatic 2 uses a tilt on/off system that eliminates fragile external switches. Pulse Induction (PI) - This technology allows hunting at the beach in salt water or in any type of soil, including black sand.