This is specifically for the Dell XPi CD MMX P166 & P133. It is unique in that it uses the ESS 1887 driver, the ESS 690 Wavetable Synthesizer, and the ESS 938 3D Audio Spatializer. This OEM ISA card made for Dell. On the Dell Drivers page you cannot find it under Win 98, only under Win 95, but this works well on either. So if you need to get the sound drivers for you Dell Laptop XPi... this is it folks!