The Aiphone SKK-620B DC Power Supply outputs 6VDC 200mA power, and comes with a 12’ output cord and 1’ ground wire. It supplies DC current to the AT-406 Handset Intercom Set, C-123L/A & C-123L/W ChimeCom Systems, LEM-1, LEM-3 Master Selective Intercom Systems, and TAR-3 Call Extension Relay.