This is a highly durable COMMERCIAL GRADE 230 volt electrical controller box for four 5500 watt elements. Requires a 40 amp outlet. Designed for use with 400 – 600 litre kettles. Comes with a lockable on/off switch, temperature control knob and ammeter. Manufactured in Canada using all North American components. Fully CSA approved and UL listed. Nema 4 encasing. Completely waterproof and corrosion proof. Comes with a one year warranty.