Electronic Shark Defense System (ESDS)

Sharks possess a sense called electroreception that allows them to receive very small electrical signals.  ESDS works by emitting a high voltage proprietary signal to deter sharks.   It is a small device worn around the ankle that works for hours with just one charge.  Our research concluded signal strength alone is not an effective means to deter sharks.  Equally, if not more important, is the signal wave form.

ZtoA Innovations created the Electronic Shark Defense, which sends out an electric pulse that short-circuits the gel in a shark’s nose.

The device has been tested on 40 to 50 sharks ranging from six to 11 feet in length.

“We would send down a fish with a rope and it would grind the fish,then another one with the device on. They didn’t eat the fish but when we remove the device, they shred it.”

It comes with a built-in battery that lasts 6 hours and can be re-charged just like a cell phone.

ESDS has decided to rebrand as NoShark - After listening to many customers requests and feedback we have recently made major improvements to the product. As of Jan 2015 NoShark has many major improvements.


Frequently Asked Questions

Q:    Can I change the battery?
A:    No, the battery is sealed within the unit.

Q:    What is the effective range?
A:    Our tests have shown an effective range of about 20 feet , sometimes much more.

Q:    Does the device work with all species of sharks?
A:    All sharks have electroreception.  We have not been able to test the device on all species.  

Q:    Can I get shocked by the device?
A:    ESDS emits a high voltage signal.  Touching the probes while the device is activated will produce a very mild electrical shock.  We caution users not to touch the probes or handle the device while it is activated.

Q:    I have a pacemaker, can I use ESDS?
A:    If you have any medical condition, please check with your physician before using ESDS.

Q:    Is the device guaranteed to work?
A:    It is impossible to predict what sharks will do.  However, our tests have shown ESDS to be very effective.  Nothing is 100% and we advise taking all necessary precautions while in the water whether you are using ESDS or not.


Dept:            150 feet maximum
Dimensions:        Approximately 2.65”W X 2.30”H X 1.15”L (enclosure only)
Weight:            Approximately 7 oz.
Power:            Internal 3.7V Li-ion battery
Battery Charger:    6 VDC,  1.0 Amp wall transformer
Charging Time:        Approximately 7 hours (new battery, varies over time)
Operational Time:    9 hours (in water)
Output:            120V to 200V pulsed proprietary wave form
Electrodes:        2 electrodes, each approximately 1” X 1” stainless steel mesh

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