This is a wideband LNA with an extremely low noise . The -103 + chip is produced by mini-circuits. It is a new modern generation of low noise ultralinear monolithic amplifier with ultra high IP3, high dynamic range and output and extremely low noise . To maximum dynamic range and linearity with the lowest possible noise . 28 MHz = G 22 dB - = 0.70 dB 50 MHz = G 25.7 dB - = 0.55 dB 145 MHz = G 25 dB - = 0.50 dB 435 MHz = G 20.4 dB - = 0.62 dB 1090 MHz = G 14 dB - = 0.80 dB 1296 MHz = G 13.2 dB - = 0.85 dB 2320 MHz = G 7.5 dB - = 1.7 dB Operating frequency: 50M-4GHz Power supply: DC9-15V DC : DC-022B inner core 2.0 round needle Connector: 2 x SMA female PROBE EMC EMI Near Field Probe: 1. Working frequency: 9K-3G; When in use, keep your hands from the PCB board. 2. Weight: 21 grams 3. Connector: SMA female head (outer teeth and inner hole) Colour:blue+green+black Material:PCB+metal Package Contents: 5 x probes 1 x cable 1 x 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.