IBM connectivity products and adapters are well known in the world for their quality and ease of use. All the products are thoroughly tested, so you will not have any problems with their installation and usage. You dont have to look further, because IBM knows what you need and brings it right to you. The ThinkPad Mini-Dock features and benefits include: pass-through connection of all ThinkPad ports, system on/off button on the Mini-Dock, Key-lock security support, and a volume control via external keyboard and software utility.Interfaces: 1 x modem - phone line - RJ-11; 1 x network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45; 1 x serial - RS-232C - 9 pin D-Sub (DB-9); 1 x parallel - IEEE 1284 (EPP/ECP) - 25 pin D-Sub (DB-25); 1 x mouse - generic - 6 pin mini-DIN (PS/2 style); 1 x keyboard - generic - 6 pin mini-DIN (PS/2 style); 1 x display / video - VGA - 15 pin HD D-Sub (HD-15) ;4 x Hi-Speed USB - 4 pin USB Type A ;1 x audio - line-in - mini-phone stereo 3.5 mm ;1 x audio - line-out - mini-phone ster