The way the Electronic Shark Defense System ESDS works is similar to the market-leading Shark Shield. The compact 7-ounce (198g) ESDS omits electric waves that interfere with the gel in a shark’s nose and keeps them away from those individuals in the ocean. The ESDS pulses are easily detected by a shark in the vicinity, causing them to stay out of the signal range.
The Electronic Shark Defence System (ESDS) becomes active immediately it is submerged in salt water (ocean / sea) providing you up to 9 hours protection against sharks. The Electronic Shark Defence System is rechargeable.