Electro-Sonic DF Mobile DeviceThis handheld device combines two sophisticated technologies, low frequency sonophoresis (sound waves) and pulsed iontophoresis (electric current) designed to be used with specific Environ products to help deliver more essential nutrients to where the skin needs them most, making a lasting difference to the appearance of your skin. Contraindications This technology is contraindicated for the following conditions: Pacemakers and electronic implants of