Access control power box is specifically designed for the access control power supply. fc-905 support ac210-230v working voltage, access control power supply maximum output is 12v5a working voltage, built-in ups backup power supply management circuit and unlock delay circuit (0-15 seconds adjustable). relay normally opened and normally closed output, can support various electric lock. the access power supply is absolutely use high-grade electronic components, advanced international technology manufacturing process, the quality is reliability.