ALPHA 3000D2 COMBO-SYSTEM 1 RECEIVER + 2 TRANSMITTERS ALPHA 500 ALPHA 500 SERIES ALPHA 520 OBSOLETE, REPLACEMENT 100478 / ALPHA 604B / 12-24 VDC OR 100477 / ALPHA 604B / 110-240 VAC!!!!; ALPHA 540 ALPHA 560A CH.408 ALPHA 560A * COMBO SYSTEM ALPHA 560A. obsolete/replacement ALPHA 607B ALPHA 560A_ Versiyon A (obsolete, replaced by Alpha 607B); ALPHA 560A_ Versiyon B(obsolete, replaced by Alpha 607B); "Alpha 560A_version B-OBSOLETE!! Replaced by ""Alpha607 B""" ALPHA 580 F ALPHA 580A ALPHA 580D ALPHA 580D ALPHA 580-D 406