Compatible with current Sony Transcribers made over the last 15 years. Works on BM-715, BM-720, BM-750, BM-805, BM-810, BM-820, BM-840, BM-840T, BM-845, BM-845D, BM-845T, BM-850, BM-850T, BM-850D, BM-880, BM-890, BM-890T, BM-890D, BM-60, BM-75, BM-80, BI-85, BM-87DST, BM-88, BM-89 and BM-246.