Apple MD031LL/A 5th Gen AirPort Extreme Base Station (Refurbished) This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. Simultaneous Dual-Band Operation Compatibility and security: AirPort Express is compatible with devices using the 802.11a, 802.11b, 802.11g, and 802.11n specifications. So no matter what Wi-Fi device youre using, it willwork with AirPort Express. AirPort Express also features a built-in firewall to protect your network from malicious Internet attacks.100-240V AC, 50-60Hz. Input current: 0.2 amp AirPlay takes the music from the iTunes library on your computer or iOS device and sends it wirelessly to any connected stereo or speakers in your home (audio cable sold separately). Play music on one set of speakers - or if you have more than one AirPort Express connected to speakers, play your music from iTunes on all of them at the same time. Hard Disk Sharing, Printer Sharing, Gigabit Ethernet Mac and PC Compatibility