Specification:
65W Dell Inspiron 640M Laptop AC Adapter 19.5V 3.34A

Input: AC 100-240V (worldwide use)
Output: DC 19.5V 3.34A
Power: 65W

Connecter size:
Internal Diameter: 5.0mm
External Diameter: 7.4mm
With central pin inside

Item Includes: AC Adapter and Power Cord.

Brand New Replacement Product, works as genuine parts, 100% OEM Compatible!!

Full 12 months warranty!!