Diamond Antenna Original A144S5 Base Station Yagi Beam Antenna, Beam, VHF, Base Station, Yagi, 5 Elements, 100 W, 144-148 MHz, 3.10 ft. Boom, SO-239, High Gain Easy Assembly Great for base or portable use. Quality Construction Factory adjusted  no tuning required. Power Rating:100 watts. Frequency:144-148 MHz. Band:2m Yagi (5 element) Connector: UHF. Gain: 9 dBi. Weight:1.4 lbs. Boom Length:37.5". Max Wind Resistance: 80 MPH Remarks: Center element insulated from ground.