for BERTONE car: We produce rotary encoder, potentiometer and switch. Passed ISO9001,ISO14001,ISO/TS16949 for BERTONE car We produce rotary encoder, potentiometer and switch.Passed ISO9001,ISO14001,ISO/TS16949 We produce rotary encoder, potentiometer and switch.rotary encoder,potentiometer and switch for musical instruments, audios,medical equipment, Walkie talkie,DVD,GPS navigation,toys , ...