The DWL-M60AT is a 6dBi Gain Portable Panel Directional Antenna designed for installation with the D-Link Air DWL-660 wireless LAN PCMCIA card. Equipped with a high Gain, this Panel Directional Antenna is designed to significantly improve the transmission and reception range of the wireless LAN card. You can plug this optional antenna to the DWL-660's antenna connector to get a better operating range. The DWL-660's built-in antenna will be disabled and replaced by this antenna. To ensur e better performance, both the transmission end and the reception end should use antennas of 6dBi Gain or equivalent.