dc motor gear encoder: 1.Passed ISO9001,ISO14001,ISO/TS16949 2.Rotational life : 100000 cycles 3.High quality , lowest price dc motor gear encoderencoder brushless motorRotary Potentiometers use for Sound Instruments, car amplifier, DVD player and GPS navigation We produce rotary encoder, potentiometer and switch.rotary encoder,potentiometer and switch for musical instruments, audios,medical ...