Rotary encoder potentiometer switch for car dvr and car dvd 1 high quality 2 Passed ISO9001,ISO14001, ... switch for musical instruments, audios,medical equipment, Walkie talkie,DVD,GPS navigation,toys ,automotive accessories (car amplifiers) Volume Control ,interphone,sport ... ISO9001,ISO14001,ISO/TS16949 Rotary encoder potentiometer switch for car dvr and car dvd