The Latitude D400 is designed for users who need a thin and light system but who aren't willing to compromise on performance. Even with its thin & light 3.7 pound design, the D400 doesn't skimp on performance, offering the ideal blend of power and efficiency using Intel® Pentium® M processors Connectivity is also a priority with the D400, which includes standard Intel Centrino Mobile Technology featuring the Dell Wireless solutions. incorporate a series of new architectural advances that optimize the performance of your notebook giving users advanced notebook processing power and enhanced battery life for extended mobility.