Product Features: 100% Brand new and high quality Large Inner Hole The new 5.8G omni-directional efficient mushroom antennas is through strict debugging、 with SWR lower than 1.5、 which is perfect match for FPV aerial photography. Specifications: Gain: 2.0dBi-2.5dBi Standing-wave ratio (SWR): !#!lt!*!1.5 Directivity: Omni-directional Center frequency: 5.8Ghz Size: 4.2*4.2*8cm Net weight: 15.25g Color: black Dimensions: 3.15 in x 1.65 in x 1.65 in (8.0 cm x 4.2 cm x 4.2 cm) Weight: 0.54 oz (15 g)