Changzhou Yuhao Electronic Co., is a professional manufacturer for the potentiometers, , encoders, rotary switches and the knobs, was founded in 2005, have ISO9001 and IATF16949 Certification and 6S management systems. All of the products are be RoHS complianced! We have the professional R&D department, tooling department , Injection workshop, and manual assembling workshop and auto-assembling workshop.The currently monthly output is 3 Million piece! Our laboratory have: Salt-spray tester, high-low temperature chamber, life test instruments, taper test instruments, rotary-torque test instrument… Our customer:Rockford Fosgate, Pioneer, Selmo, Ringway, Daesung Hi-Tech , Harman , Midea, Haier, Phillip, Honeywell, etc. Welcome for any inquiry and OEM project!