Ubiquiti Networks airRouter/Serial info

cat /proc/cpuinfo
XM.v5.3# cat /proc/cpuinfo system type            : Atheros AR7240 (Python) processor              : 0 cpu model              : MIPS 24K V7.4 BogoMIPS               : 259.07 wait instruction       : yes microsecond timers     : yes tlb_entries            : 16 extra interrupt vector : yes hardware watchpoint    : yes ASEs implemented       : mips16 VCED exceptions        : not available VCEI exceptions        : not available