Hello, I have Iphone 5 with Itunes music, airport express, 2 stereo speakers. What else do I need to hear music on the speakers?

Hello ricsch,

It sounds like you want to setup your Airport Express to Airplay music from your iPhone 5. I found an article with steps to help you get this setup:

Connecting to an existing Wi-Fi network, exclusively for iTunes music

AirPort Express used exclusively for AirPlay by setting it up in Client Mode. Choose this configuration if the computer containing your iTunes library may be out of direct range of the AirPort Express, but is within range of the Wi-Fi network.

How to Set It Up Connect your AirPort Express to your home stereo or powered speakers. From your computer, join the wireless network. Use the AirPort status menu in the menu bar on a Mac. On a Windows-based computer, hold the pointer over the wireless connection icon until you see your AirPort network name (SSID), and choose it from the list if there are multiple networks available. Enter the network password, if necessary. Open iTunes on your computer and choose the AirPort Express(es) you wish to stream music through from the speakers pop-up menu in the lower-right corner of the iTunes window.

I also recommend reviewing the sections titled "Some things you should know about AirPort Express with AirPlay" and "Things to consider before you begin" in the full article:

Wi-Fi base stations: How to set up and configure AirPort Express for AirPlay and iTunes

http://support.apple.com/kb/ht4587

Thank you for posting in the Apple Support Communities.

Best,

Sheila M.