welcome to our Smile shop upgrade premium Round button 3-level switch carbon fibre Alloy wire seat heater,heated seat,car switch heating pad Features: Carbon Fiber material, not easy to corrode or break Two heated pads for each seat: 1 on back and 1 on the bottom Apply to any cloth, leather, or vinyl covered Continuous temperature monitoring prevents overheating, safe and reliable Adhesive tape included, for holding in place while reinstalling the seat cover A comfortable necessary for driving in winter Alloy fiber material, stable quality, long service life, fast heating,Will not burn the seatconsistent with new products after long-term Switch size: A 1 B1 Specifications: Material: Carbon Fiber Dimension(Unit): Approx. 480mmx 280mmWire Length: 2.5M Power Rating: DC12VWattage: 25 Watts /pad Thermostat: 655c B1B2 Specifications: Material:Alloy fiber Dimension(Unit): Approx. 470mmx 270mmWire Length: 2.5M Power Rating: DC12VWattage: 25 Watts /pad Thermostat: 655c Dual Temperature Control System: Electronic thermostat (built into each pad) regulates the electricity / temperature circulating Within the carbon fiber seat heating pad. This system regulates the flow of power and maintains A precise temperature range whether on the high or low setting. Example: The high setting will have a constant range between 120F to 125F. The low setting ranges between 110F to 115F. These respective temperatures will for always be maintained at these respective levels. Features: Universal fits most cars Brand new and high quality Apply to any cloth, leather, or vinyl covered Continuous temperature monitoring prevents overheating, safe and reliable Adhesive tape included, for holding in place while reinstalling the seat cover A comfortable necessary for driving in winter Package Included:A1, B1 TWO SEATS = 2 switch + 1 wiring harness + 4 carbon fiber heater element.A2, B2 TWO SEATS = 2 switch + 1 wiring harness + 4 Alloy wire heater element.Connection diagram Every product is rigorously tested Everything is normal before sending the package TWOSEATS As shown below Switch function introduction Switch and wiring harnessAs shown belowfuse As shown below Carbon fiber heating padsAs shown below