Features: Brand new and high quality. 2x2 radio transceiver and PCI interface, suitable for low-power and small-size applications. Supports Windows XP / 7/8/10 / ROS operating systems. Connect the adapter to an available PCI slot to upgrade your desktop computer. If this product has any quality problems or if you have any questions about this product, you can contact us at any time. Integrated multi-protocol, baseband processor, analog-to-digital converter, and digital-to-analog converter (ADC / DAC) in a complete CMOS device. Supports 802.11 wireless protocol, 802.11i security, receive and transmit filtering, error recovery, and Quality of Service (QoS). Realizes half-duplex OFDM, CCK, and DSSS baseband processing, supporting 20MHz and 300Mbps 40MHz channel operation up to 130 Mbps, and IEEE802.11a/b/g data rates. Supports two simultaneous transmission streams, utilizing two integrated transmit and receive chains to achieve high throughput and range. Specifications: Chip: Atheros AR9223 PCI WIFI Adapter Standards: IEEE 802.11 b/g/n Speed: up to 300Mbps Frequency: 2.4GHz/5GHz Interface: PCI Operating System: for Windows XP, for Windows 7 32bit/64bit, for Windows 8 32bit/64bit, for Windows 10 64bit. ROS (Please note that we do not have technical support for the ROS system, you should study it yourself.) Note: Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x AR9223 PCI WIFI Adapter 2 x Dual-band Antenna 1 x Screw