rotary video encoder , potentiometer and switch 1.Passed ISO9001,ISO14001,ISO/TS16949. 2.Rotary life :100000 cycles 3.LJV We produce rotary shaft video encoder, potentiometer and switch.rotary encoder,potentiometer and switch for musical instruments, audios,medical equipment, Walkie talkie,DVD,GPS navigation,toys ,automotive accessories (car amplifiers) Volume Control ,interphone,sport equipment ...