LevelOne's OAN-1030 3dBi Omni-directional Ceiling Antenna provides an easy solution to improve the performance and increases coverage for the existing 802.11g and 802.11b wireless devices. With the ceiling mounting kits, the antenna can be easily fixed on the ceiling to achieve the best wireless coverage. The approximate range under 54 Mbps is around 40m. There is no power-source needed in order to increase the flexibility of installation.