Electricians and alarm installers! $75 · BPS 1 amp Power Supply, new power supply for electronic alarm systems. These are excess-purchase items from a commercial project - now going for a song. Brand new and unused. The Securitron BPS24-1 single voltage power supply delivers linear technology recommended by most manufacturers of sensitive electronic access control and security components. Safe for use with readers, electric strikes, and maglocks, these units interface to fire alarm systems. I have 10 of them available at $75 each. This is the only time you will see them at this price.