This 300Mbps Wireless-N PCI-E Adapter is an IEEE802.11b/g/n compliant wireless PCI adapter. It provides superior performance and interoperability within a mixed mode network (802.11b, 802.11g and 802.11n). This device is backwards compliant with all 802.11b/g/n wireless equipment. Its auto-sensing capability allows high packet transfer up to 300Mbps for maximum throughput, or dynamic range shifting to lower speeds due to distance or operating limitations in an environment with a lot of electromagnetic interference. Your wireless communications are protected by up to 128-bit encryption, so your data stays secure