... gold(ENIG), Chemical tin, Carbon ink.8)solder mask color: Green, yellow, black, white, red, blue 9)profiling: Punching, Routing, V ... )Certificate: UL, ISO9001, ISO14001, ISO/TS 16949, RoHS 15)Impedance control: Microstrip impedance: 50-60Ω, Tolerance: +-10% Differential Impedance: 90-120 ... )Quality standard: IPC-A-600F. print circuit board for electronic remote control