switch lock : 1.Passed ISO9001,ISO14001,ISO/TS16949 2.Rotational life : ... ALPS Rotary encoder Potentiometer and switch use for Sound Instruments, car amplifier, DVD player and GPS navigation We produce rotary encoder ... medical equipment, Walkie talkie,DVD,GPS navigation,toys ,automotive accessories (car amplifiers) Volume Control ,interphone,sport equipment communication equipment, computer / ...