1.Description: It is a USB external sound card.Output analog audio signals can directly drive headphones or output to active speakers.No driver installation is required in WIN2000,WINXP,WIN3003 systems. 2.Feature: 1>.Driverless sound card 2>.Ultra-small size 3>.High-fidelity audio output 4>.USB interface,plug and play,replacing traditional sound card 3.Description: 1>.Product Name:USB External Sound Card 2>.Chip Model:CM108 external crystal 3>.Output:3.5mm green headphone jack 4>.Input:3.5mm microphone socket 5>.Work Temperature:-25℃~85℃ 6>.Work Humidity:5%~95%RH 7>.Size:52*19*8mm 4.Package: 1>.1pc USB External Sound Card