Sony VAIO S Series 15" Port Replicator Docking Station with 500GB Hard Drive VGPPRS35One Connection For EverythingWith a docking station, you can quickly and easily connect to your external monitor, AC adapter, and countless other peripherals without needing to plug and unplug every time you arrive at your desk.Built-in BackupWith the built-in 500GB hard drive storage backing up your data has never been easier.1CompatibilityOnly compatible with VAIO® S Series 15 laptop. AC Adapter included.