The HeatMat 500mm x 770mm Mirror Demister is designed to prevent misted mirrors in bathrooms. It features a carbon heating element with copper connections and an IP44 rating for moisture resistance. The demister has a self-adhesive backing for easy installation and can be wired to a separate switch or the lighting circuit. Please note, it is not suitable for use with dimmer switches. Dimensions are 500mm x 770mm, with a wattage of 73w and voltage of 230V. Resistance is 708 ohms.