This antenna works in VHF and UHF. In the whole range of 136-174mhz and 400-470mhz. It is an ideal antenna for working on the amateur radio frequency 144-146/430-440Mhz. A gain so far never seen in Baofeng.Specifications:Frequency: 136-174/400-470MHzGain: VHF 2.50dBi and UHF 3.3dBiMaximum power consumption: 10 wattsImpedance: 50 OHMConnector: SMA-FLength: 38 mmWeight: 35gCompatible with walkie-talkie :  Kenwood TYT Retevis Baofeng Quansheng