900MHz ISM antennas are normally used for WLAN (Wireless LAN) networks for point-to-point or point-to-multipoint bridges. These are usually used to allow long range radio wave propagation avoiding 2.4GHz band interference as well as taking advantage of the obstacle penetration capability of the larger wavelength 900MHz signals. Contact us if interested in specific Pt-Pt or Pt-Mp applications or check out BWA