This amplifier is suitable for use in the frequency range of 125-185MHz, especially for the front-end amplifier of 144MHz receiver. It has ultra-low noise figure and high RF gain, which can effectively improve the receiving sensitivity of the equipment and is very suitable for the front-end of amateur radio receivers. Operating frequency: 125-185MHz Operating voltage: 3-5V Operating current: 65mA (typical value) Amplification gain: 26dB Maximum output: 100mW (20dBm) Noise figure: 0.5dB (very small) Connector model: SMA-K (SMA standard female, external screw inner hole) Wiring method: RFin: input signal amplification RFout: output amplified signal DC: positive power supply Wire nose: negative power supply Colour:Silver Material:Aluminum Alloy Package Contents: 1 x Low Noise Amplifier Only the above package content, other products are not included. Note: Light reflection 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.