Round 3-Level Switch Car Seat Heater Fit cars All type cars Switch Universal Material Carbon fibre Export More than 2,7530sets per year Supplied to China ChangChun FAW,Volkswagen,etc Certification ISO:9001:2015, GB/TS 16949:2009etc CE,ROHS Strict test passed Passed 13 items strict test in US,such as knee load test,180-degree bending durability test, powered endurance test, ingress egress test etc. Failure rate <3‰ in 3 years Warranty 2 years/24,000 km