The Kenwood KPG-46U USB programming cable is designed to work the TM-271A and TM-281A.
This cable is 4.92 feet long and is USB 2.0 compliant. It comes with a Windows driver CD.
The KPG-46U requires Windows XP, Windows Vista (32/64 bit) or Windows 7 (32/64 bit).
The Kenwood KPG-46U has been replaced by the KPG-46X.