The Cisco PWR-3900-POE Power supply (internal) permits you to plug in one unit and instantaneously supply power to the Cisco 3925, 3925E, 3945, 3945E witches and routers. The Cisco PWR-3900-POE Power supply (internal) is made precisely for these replicas, the renovated Cisco router Cisco PWR-3900-POE Power supply (internal) unit is the lone method to reliably energize the Cisco modules. This Cisco PWR-3900-POE Power supply (internal) device operates well regardless of the place one is since it supports the line frequencies ranging between 50 and 60 Hz. The PWR-7200-AC is designed to be compatible with 110 VAC and even 240 VAC supplies. It can easily cater for the input power error limits of ±10 percent. The PWR-7200-AC AC power can be able to supply outputs of 280 Watts across a stable +5 VDC-12 VDC and +3.3 VDC rails.