The 26140 is a 12 Vdc heater kit offered as a common accessory for the CC640 Camera. This kit can help prevent the window of the 18543 Camera Enclosure from frosting over. The 26140 consists of a heater, solid state relay, wire nut, and field power cable. The heater is fitted with a connector for attachment to the field power cable. The other end of the power cable connects to a suitable power source.