EMF Harmonizer for Hybrid and Electric Cars The eCar by EMF Harmony gives you the protection you need to keep yourself and your family safe as you're exposed to electromagnetic radiation emitted by your hybrid or electric car. It offers protection from EMF radiation by neutralizing the damaging energetic frequencies emanating from the batteries, motor, and electronics in your car as well as from EMFs coming from outside of the car. We're excited to offer the best-selling eCar by EMF Harmony to our suite of EMF protection products! How many do you need? hybrid - 1 per vehicle electric - 1 per vehicle How it works. Electric and hybrid vehicles emit a significant amount of EMF radiation due to the batteries, motors, and electronics in the vehicle, so protecting your health is important. The eCar does not interfere with the operation of the car because it's not blocking the EMF radiation, it's neutralizing the damaging energetic frequencies that wreak havoc on your health.