Premiertek 802.11a/b/g/n/ac Dual Band 2.4GHz/5GHz Wireless USB 2.0 LAN Adapter up to 433Mbps (PT-8811AU) Chipset: Realtek RTL8811AU Standard: 802.11a/b/g/n/ac (pre)Transfer speed up to 433Mbps 2.4GHz and 5GHz ISM 2.0 interface Wi-Fi supported for P2P PAN network OFDM with BPSK, QPSK, 16QAM, 64QAM and 256QAM modulation CCK, DQPSK, DBPSK, BPSK, QPSK, 16 QAM, 64 QAM and 256 QAM modulation schemes WEP, WPA/WPA2 (TKIP/AES) encryption schemes Maximum PHY data rate up to 72.2 Mbps using 20MHz bandwidth,150Mbps using 40MHz bandwidth, and 433.3Mbps using 80MHz bandwidth Certificates: CE, FCC, RoHS, Reach Dimensions: 1.18" x 0.58" x 0.3" (L x W x H) System Requirements: Windows XP, Vista, 7 ,8, 8.1 (8.1 requires to download from premiertek.com) Does not work with MAC and Linux