The Most Popular Handheld Duck Antenna High gain dual band 144/440 MHz Flexible Duck antenna. 15 3⁄4" long, its 15 1⁄2 wave on 440 MHz that gives a hearty 2.15 dBi gain. On 2 Meters you get an efficient full size 1⁄4 wave precisely factory tune for low SWR. High-Q, low loss construction. - female SMA Connector that fits Wouxan handheld radios. See the MFJ-1717 for a BNC connector. The MFJ-1717S has a male SMA connector.