1,The RF front end adopts two-stage low noise amplifier and two-stage special filter 2,It is specially used for ADS-B receiver front-end RF amplification 3,The front end has high gain, low noise, and large dynamic range 4,Double filter structure can guarantee enough inhibition of out-of-band signal, effectively improving the signal-to-noise ratio 5,Standard SMA female connectors are suitable for connecting most devices Features: The RF front end adopts two-stage low noise amplifier and two-stage special filter. It is specially used for ADS-B receiver front-end RF amplification. The front end has high gain, low noise, and large dynamic range. Double filter structure can guarantee enough inhibition of out-of-band signal, effectively improving the signal-to-noise ratio. Standard SMA female connectors are  suitable for connecting most devices. Specifications: Voltage: 3.3V-5.0V DC Frequency: 1090 15MHz (special for ADS-B reception) Gain: 38anddB Out-of-band Rejection: -75dB and-50MHz; -55dB and-1GHz Connector: SMA-female Package Includes: 1 x Amplifier Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.