This is the 5V, 1.2A, 2.1mm I.D. x 5.5mm O.D. x 9.5mm Barrel Jack PSU that ships standard with our UE9 and EB37 products.  It is also compatible with our RB12.  When ordering, please choose what power supply clip you need.  We ship USA power supply clips by default but Australia, China, Euro, and UK clips are also available.