This card uses the manufacturer's via chip It has 5 USB2.0 interfaces (one of which is built-in), with a transfer rate of up to 480Mbps/second Backward compatible with USB1.0, USB1.1 It has good compatibility, driver-free, good compatibility and speed! PCI to USB adapter card/USB2.0 interface Designed in accordance with USB2.0 specifications, it provides the host with a USB2.0 transmission interface Using via chip, it works more stably and is compatible with motherboard chips Backward compatible with USB1.x, can connect USB1.x or USB2.0 devices at the same time Support hot plugging, when adding devices, it be dynamically adjusted without user settings. Interface transmission rate: 1.5Mbps (USB1.0), 12Mbps (USB1.1), 480Mbps (USB2.0) Provides 5 external USB2.0 interfaces; 4 external, 1 built-in, Supports Windows98/ME/2000/2003/XP/VISTA/ OS 8.6 or above Complies with 32-bit 33MHz PCI bus specifications Supports PCI bus power management interface Can be used to connect USB mobile hard disks, USB mice, scanners, keyboards, digital cameras and other USB devices (Due to different batches, the printed words on the product be different, which does not affect use) Material: PCB colour: black Package Contents: 2 x Expansion Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.