The Hawking Hi-Gain HA12W Antenna 12 dBi Wi-Fi Directional Window Antenna offers a convenient solution for strengthening and directing WiFi connection signals. The power rating of WiFi antennas is measured in terms of decibels (dBi).The Hi-Gain HA12W Antenna Window Antenna boosts the antenna power of standard antennas from a minimal 2dBi to a more potent 12dBi.