The HSM3350NA is a 12VDC,  3 amp power supply from DSC, with dual battery backups that are individually supervised. Power brick transformer included.
Features:- Provides additional 12VDC, 3 amps of power
 - Dual battery backups individually supervised
 - Uses HS65WPSNA power supply adapter
 - Connect up to 3/4 modules per system
 - Provides enhanced diagnostics information for similar diagnostics