The footswitch RS31 incorporates 3 buttons to easily control your transcription software. Just play, stop rewind etc. with your foot and navigate through your dictation files while you can keep on transcribing. Olympus´ professional footswitches are designed for heavy duty use and to be comfortable even for operations over several hours. Compatible With\r\nDS-3500, DS-7000, DS-3300 , DS-3400\r\n\r\n