Knocked around and scratched up, but it works fine. It's passive, so no power required. 

Model: DOD 270 A-B Box 
Made: USA, 1990s approx
Serial: missing
Type: switching
Power: passive
Equivalent New Street Price (Approx): N/A
Mods: none
Accessories: none

Condition Notes: used, no major marks. Tested and fully functional.
Overall: very good condition (8/10)