The Cisco AC Power Supply for Cisco ISR 4450 & ISR 4350 PWR-4450-AC-RF is a Cisco internal power supply with AC 100/240V - 47/63 Hz input voltage that is specifically designed to work accurately with Cisco 4451-X, 4451-X Application Experience, 4451-X Integrated Services Router, 4451-X Integrated Services Router Security Bundle, 4451-X Integrated Services Router Voice and Video Bundle, and 4451-X Integrated Services Router Voice Security Bundle.WARRANTYThis item is a remanufactured and supported by Cisco with a 90-Day Limited Hardware Warranty.FEATURES• Power supply - internal• AC 100/240 V Input Voltage• 47/63 Hz Frequency Required• Designed for Cisco 4451-X SeriesWHAT'S INCLUDED• 1 x Cisco AC Power Supply for Cisco ISR 4450 & ISR 4350 PWR-4450-AC-RF