Mobile Radio Antenna Frequency Range: 144/430MHz (VHF:136-174MHz; UHF:400-470MHz); Electrical Specifications: VSWR: less than or equal to 1.5; Gain: 144MHz (3.0dBi),430MHz(5.0dBi); Max Power Input: 100W; Impedance: 50 ohm; Polarization: Vertical; Radiation: Omni; Mechanical Specifications: Height: 20.3inch/51.5cm; Antenna Connector: NMO NMO mobile transceiver antenna requires no tuning. The whip mast is made of metal. (NMO magnetic base is NOT included) 3.0/5.0dBi high gain for better TX and RX. Dual band NMO antennas work for VHF UHF Icom HYT mobile radios. colour: as shown Material: metal Size: Length: about 50cm Package Contents: 1 x Dual Band NMO Antenna Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.