The Wireless provides optimal range performance and best overall value for wireless USB adaptors. With a detachable external antenna at 150Mbps you get unmatched transmission range sensitivity and speed compared to wireless. It is ideal for better antenna position to reduce interference and obstacle. - IEEE 802.11n/b/g device supports up to 150Mbps raw transmission rates - USB 2.0 connectivity and USB 1.1 compatible - 2.4GHz frequency - Detachable antenna - Operation range up to 20m (indoor) / 30m (outdoor) - manufacture rated - Driver CD included - Supports Windows Vista/XP/ME/2000/7