brand new and high quality Features: Support 802.11AC standard WiFi. for 802.11b/g/n wireless devices. Built-in two power amplifiers increase the signal transmission and reception strength. External two omni-directional high-gain dual-band antennas increase the receiving range. High wireless transmission rate, dual-band optional (2.4GHZ/300Mbps, 5GHZ/867Mbps). Support WPA/WPA2/WEP/802.1X/WMM data encryption. for Windows XP/Vista/7/8/10, Linux and other operating systems. Has a strong anti-interference ability. Specification: Product name: wireless WiFi adapter Main chip: RTL8812BU Wireless standard: IEEE802.11ac/a/n/g/b Interface: USB 3.0 Antenna: external 5DBI for smart omni-directional dual-band antenna (two) Transmission distance: Indoor Max: 100 meters (varies depending on the environment) Working frequency: 2.412~2484GHz/5.15~5.825GHz (according to national area) Transmission power: 802.11b (CCK) 11Mbps: 18+/-1dBm 802.11g (OFDM) 54Mbps: 15+/-1dBm 802.11n(OFDM) 54Mbps: 15+/-1dBm 802.11ac (AC80) MCS9: 12+/-2dBm EVM: 11b 11Mbps: