Model: ADP-90SB BB
Acer P/N: 
INPUT: 100-240V~ 1.5A, 50-60Hz
OUTPUT: 19V 4.74A 90W
Connecter size: Int. Diameter: 5.00mm     
                       Ext. Diameter: 7.40mm
                       (With pin in the middle) 
Dimensions: 130 x 55 x 30 mm
*Please do not mix up with another adapter with the same model number but different connector size, please check carefully the connector's measurement  of your adapter.
**When buying any compatible AC adapter, please take note the type of power cord(2 or 3-prong) used.
***Please take note, 3 wire AC power cord not included.