2 AKG omnidirectional microphones with 8.2 ft. Y-cable (each)Left/Right channel playback (separately or simultaneously)Compatible with the Olympus DS-2200, DM-10, and DM-20 digital voice recordersStreamline transcription tasks with the AS-4000 Transcription KitAudio is recorded in high-quality Windows Media Audio (WMA) file format Capture, store, and transfer hours of recordings (available hours vary depending on xD-Picture Card capacity used with compatible voice recorder)