Comet Original HT-224 Handheld 146/223/446 Tri-Band / Wide Receive: 118-160, 180-280, 360-520 MHz Antenna - Connector SMA Transmit: 146/223/446 MHz Receive: 118~160, 180~280, 360~520 MHz Connector Type: SMA Length: 11 Inches Gain:144 Mhz.1.3dBi 1/4 wave,220 MHz.1.4dBi 1/2 wave,440 MHz. 1.8dBi 5/8 wave,Max Power:10W