EnGenius ESR-9710

aka the Rosewill RNX-N4 (Rosewill is a Newegg brand)

RAM and Flash noted on Senao website On the DD-WRT known incompatible devices list

Specs
Platform Serial Num. = ? FCC ID = ? Industry Canada ID = ? CPU Type = Ubicom IP5160U MIPS Rev = ? CPU Speed = 275 MHz Bus = ? Flash Type = ? Flash Chip = ? Flash Size = 4 MB Max Firmware Size = ? RAM Size = 16 MB RAM Chip = ? nvram Size = ? ETH chip1 = Ubicom IP5160U Switch = Vitesse VSC7395XYV Port-based vlan = ? 802.1q vlan = ? Ethernet Port Count = 1-10/100/1000-WAN 4-10/100/1000-LAN Wired Standard = IEEE 802.3/3u/3ab Ethernet interface OUI = none specified boot_wait = ? bootloader = ? Flash Card Socket/Type = ? SD/MMC Mod Support = ? Expansion IF types = x1 PoE = ? Power = 12VDC/1.25A Connector type/size = Barrel plug LEDs/Color = Power/Status, WAN, LAN1~LAN4, WLAN Size = ? USB = ? Serial Port = ? JTAG Port = Yes Supported by TJTAG/Version = ? Special Features = ? Radio WI1 module = Senao NMP-9701 WI1 module IF = Mini PCI Wireless Radio = Ralink RT2820 WLAN DSP processor = Ralink RT2860 Wireless interface OUI = none specified Antenna Connector Type = U.FL, RP-SMA MIMO status = 2x3:2 Wireless Standard = IEEE 802.11b/g/n 802.11n = up to 300 Mbps 802.11g = 6, 9, 12, 18, 24, 36, 48, 54 Mbps 802.11b = 1, 2, 5.5, 11 Mbps WiFi Operating Frequency = ? Radio cor_rev = ? Radio Capabilities = ? Other Default IP address = 192.168.1.2 Default login user = admin Default login password = blank Default SSID = ? OEM = ? 3rd Party Firmware Support = ?

Links of Interest

 * Datasheet