5 ms·And this is why https://www.floppydisk.com/ https://www.floppydisk.com/ is still doing well.by meshaneian 3y agoAnd this is why https://www.floppydisk.com/ https://www.floppydisk.com/ is still doing well.doubleg72 3y agoNot to mention rs-232voytec 3y agoRS232 has adjustable frequency whereas USB can't be configured this way, making it useless for GPS devices used for time synchronization and such.