Laptop docking station external interfaces modem rj11 parallel serial port lan rj45 usb 20 video output s video tv out usb 20 ports 1 compatible with hp compaq 6715b hp compaq 6510b hp compaq 8710w hp compaq 6530b hp elitebook 6930p hp compaq nc6320 hp compaq nc4400 hp compaq 6730b hp compaq tc4400 hp compaq 8510p hp compaq 6910p hp compaq 6710b hp compaq nc6400 hp compaq nc8430 hp compaq 6735b hp compaq 8510w