You are looking at used Rosewill RNX-AC1900PCE WiFi Adapter. The adapter supports Supports advanced security: 64/128 WEP, WPA/WPA2, WPA-PSK/WPA2-PSK(TKIP/AES) beamforming technology: connect with stronger, more reliable wireless connections it using a WiFi 802.11ac chipset to reach ultra-speeds of up to 1300Mbps at 5GHz band, which is three times faster than 802.11n WiFi speed. Simultaneously, it maintains full backward compatibility with all previous WiFi standards. With wireless speeds of up to 1300Mbps+600Mbps and advanced MIMO technology, RNX-AC1900PCE provides a fast, reliable wireless connection for lag-free online gaming and video streaming. It achieves the best performance with wireless 11AC devices, but also works seamlessly with existing WiFi networks. allows to connect with a 2.4GHz or 5GHz network. It allows users to experience better ultra HD video streaming and online gaming in the 5GHz band, and to use the 2.4 GHz band for simple tasks such as sending e-mails or website browsing to meet all your internet need. Including Three Detachable dual band antennas with the adapter