Features: Continuously variable type,the rated thermal current is 10A Easy to wire,convenient to use,it is a great replacement for broken ones Widely used for adjusting speed of automobile fan heater,defroster,fans,etc This is a upgraded fan heater control switch designed with heat sink that will ensures a better heat dissipation Universal fit for 12V or 24V,supports high power,120W@12V,240W@24V Specifications: Voltage:12V or 24V (universal) Rated Thermal Current:10A Rated Power:120W@12V,240W@24V Wiring: Red: Power supply+, Motor+ Blue: Motor- Black: Power supply- Size:9.5*3.5*3.7cm/3.74*1.18*1.46inch Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x DC 12V/24V Controller Switch