No image45 additional heater; sales codes: 470 / 580 / 974 / 975; sales codes: h12 / H13 / H14 / H80 / H8650352; 10 / 13; 12V,WITH PRESET TIME SWITCH; Modifications: 500 - 508/520/521/531/700 - 705/720 - 725/730 - 737/784 - 787/800/801/802/820/821