Within one year or within 100,000 Kilometers,the retarder is repaired without fee,and maintenance for service time is supplied.

NF  electromagnetic retarder passed strict inspection and authorized test,  successively passed many gear box manufacturer’s matching certification  test, and gained the matching and installation certificate; passed road  test held by national vehicle quality technology supervising department,  in which most of the performance index show the fact NF retarder is  advanced and better than other same product at home.