Power Supply Kit
These are some common tools used to work on this device. You might not need every tool for every procedure.
The Apple AirPort Express Base Station is a small device about the size of a MacBook AC adapter that can be used to set up a 802.11 wireless network. The device also utilizes iTunes AirPlay feature, which allows you to wirelessly stream music from your iTunes library to the AirPort Express Base Station.
iFixit Blog: How to fix your AirPort Express Base Station