This Heatmat 7050L105 Mirror Demista/Demister is 500mm x 1050mm and has a wattage of 100w and voltage of 230V. It features a carbon heating element with copper connections and is IP44 rated. The demister has a self-adhesive backing and can be wired to a separate switch or through the lighting circuit. It is not suitable for use with power supplies controlled via dimmer switches. The dimensions are 500mm x 1050mm and the resistance is 517 ohms.