Go to Amazon.com : http://www.amazon.com/gp/product/B000EXW236?tag=theatrecat-20
HP Laptop Docking Station
The HP Docking Station with Smart Adapter features a new energy-efficient 120W Smart AC adapter that guards against power fluctuations with integrated surge protection
Compatible with the HP Compaq 6510b HP Compaq 6710b HP Compaq 8510p HP Compaq 8510w HP Compaq 8710p HP Compaq 8710w HP Compaq 6515b HP Compaq 6715b HP Compaq 6910p nc4200 tc4200 nc4400 tc4400 nc6120 nc6140 nc6220 nc6230 nc6320 nc6400 nc8230 nc8430 nw8240 nx6125 nx6325 nw8440 nw9440 nx7400 nx9420