100% brand new and high quality Features: Supports two simultaneous transmission streams, using two integrated transmit and receive chains to achieve high throughput and range performance. Integrated multiprotocol, baseband processor, analogtodigital converter and digitaltoanalog converter (ADC / DAC) in a complete CMOS device. Support 802.11 wireless protocol, 802.11i security, receiving and sending filtering, error recovery and quality of service (QoS). Realizes halfduplex OFDM, CCK and DSSS baseband processing, supports 20MHz and 300Mbps 40MHz channel operation up to 130 Mbps, and IEEE802.11a/b/g data rates. 2x2 radio transceiver and PCI interface, suitable for low power consumption and small size applications.Support Windows XP / 7/8/10 / ROS operating system.Plug the adapter into an available PCI slot to upgrade your desktop. If this product has any quality problems or you have any questions about this product, you can contact us at any time. Specifications: Chip: Atheros AR9223 PCI WIFI Adapter Standards: IEEE 802.11 b/g/n Rate: up to 300Mbps Frequency: 2.4GHz/5GHz Interface: PCI Operating Systems: Windows XP, Windows 7 32bit/64bit, Windows 8 32bit/64bit, Windows 10 64bit. ROS( Please note that for ROS system we have notechnical support, you should study by yourself.) Note: Please allow 0-1cm error due to manual measurement. pls 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