From the horse’s mouth
DCH-M225 Wi-Fi Audio Extender
D-Link are another company who are emulating the success of the Apple AirPort Express multifunction device by offering a device that works as a 2.4GHz wireless range extender or a network audio player for the home network.
The DCH-M225 Wi-Fi Audio Extender can extend a 2.4GHz 802.11n Wi-Fi segment’s range using dual-stream technology and WPS “push-to-connect” enrolment. Or it can work as a Wi-Fi-connected audio player according to either AirPlay or DLNA MediaRenderer standards, thus making it feasible to play out music from your smartphone, tablet or computer to your favourite stereo equipment that is connected to this device. It would earn its keep in the “smartphone-based DLNA’ setups as well as with music piled up on a DLNA media server as described in this feature article.
Personally, if I wanted this device to be a direct competitor to what Apple offers, it would have to have an Ethernet port so it can also work either as a wireless client bridge or an access point as well as the music player and wireless-network range extender.
At least D-Link is using the audio playback functionality as a way to differentiate itself from the horde of wireless-network extenders that is being offered.