HYS 6U110 Alterable Antenna is made of high quality aluminum. You can adjust the length to achieve the frequency you want, and can provide excellent effect. Frequency:390-470MHz(Adjustable) / Max Input Power:100Watt / Impedance:50Ω/ VSWR:≤1.5 / Gain:6dBi / Polarization:Vertical Length:37inch-43.3inch / Connector: So239 (UHF-Female) / Weight:0.6KG Compatible with Motorola Kenwood Icom Midland Mobile Transceiver mobile radio or transceiver with a frequency of 390-470Mhz What you get: 1PCS HYS 6U110 Outdoor Antenna. 1PCS Allen Wrench. 1PCS Bracket Mounting. If you any technical or unsatisfactory problems, plz contact us by clicking “RADIO MAX” that below the "Buy Now", and find the button "ask a question".