ALPHA500R obsolete, replaced by ALPHA 604; ALPHA 604BS B50001 (100073) DL01 (100690) ALPHA 500 OBSOLETE, REPLACEMENT ALPHA 604A RF;REMOTE CONTROL Alpha 604A RF P/N: 100496 Alpha 5000 100423 ALPHA 604B old version, new version ALPHA 604BS; ALPHA 580B ALPHA 612BS 100415. Alpha 540A Transmitter ALPHA 500 ALPHA 560A obsolete, replaced by ALPHA 607BS;Remote controller and receiver