This device is not based on Texas Instrument AR7 (like other members of the Sinus family), but on an ARM processor (see hardware image below)!
For more info about hardware please see: http://forum.openwrt.org/viewtopic.php?id=2654#p24145 (post #16).
Patches which support the BRN bootloader are needed. You might get them from http://ar7-firmware.berlios.de/, but the device is not listed as officially supported because it is not AR7 based.
TODO: Is this model really supported by the target.ar7 project? Of course, no.
|Ethernet||ADMtek ADM6996l||10/100 Mbit/s|
|WLAN||ISL3880IK||b/g, 2 antennas, left & right|
It also has a USB Port and different miniPCI WLAN card which can not be seen on the image due to glue. After removing the glue the Chip desc reads ISL 3880 IK.
The power supply is called 'SNG 3-acc'. Specs: 12VDC, 1A max, - -(o- +