AXD7690 Replacement Remote for Pioneer VSX323K VSX423 VSX-421-K AV ReceiversAXD7690 Replacement Remote for Pioneer VSX323K VSX423 VSX 421 K AV Receivers. No programming required, plug and play. 2x AAA batteries are required (not included). Compatible with (but not limited to these models): VSX 300 VSX 323 VSX 323 K VSX 423 VSX 523 K VSX 523 VSX 92TXH VSX 322 K VSX 421 K VSX 823 K VSX 828 S VSX 828 K VSX 528 S VSX 528 K VSX 917V S VSX 1124 K