Opticon crd1006 is equipped with charging communication features for the oph1003 oph1004 oph1005 two slots provide charging of both the docked terminal and a spare battery the external communication is supported by either rs232 or usb interface electrical specifications voltage requirement 6 v dc output for terminal charging 4 2 dc output for battery charging battery charging time max 2 5 hours communication specifications available interfaces rs232 usb vcp serial port