Unversal Compact Heater/Defroster, Electronic Operated #IP-166HDE Small Compact Design fit a variety of applications. 12 Volt, Low Amperage Draw Use with Standard 5/8" Heater Hose (not Included) Electronic Servo Operated Defrost Function Includes: Heater/Defroster, Switch, Electronic Servo Motor with Rotary Control and Mounting Brackets.