Features: OOTDTY   brand new and high quality new and high qualty 4.1-channel digital sound card Motherboard PCI sound card with 5 channel expansion card Imported CMI8738 chip, standard PCI slot, stable, durable, good sound quality and long life Operation System: Windows XP WIN 7/WIN 8/WIN 10/Linux This sound card can solve the following problems of the motherboard onboard sound card: 1. The motherboard sound card is broken; 2. The motherboard has no sound card; 3. There is no microphone function, it is not suitable for customers who need to use voice to buy Specifications: Item: 4.1 PCI Sound Card 5 Channel Expansion card Chipset: CMI8738 5CH Size: approx 12x11.6x3.7CM/4.72x4.57x1.46in Package Includes: 1 x PCI-E Digital Sound Card Note: Only one speaker can be connected, connect the speaker to green hole This sound card does not support singing, live broadcasting, and shouting. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.