The VNA-28B+ from Mini Circuits is a RF Amplifier with Frequency 500 MHz to 2.5 GHz, Gain 23 dB, Noise Figure 2.9 dB, Output Power 43 to 11.4 dBm, Output Power 19.95 to 0.01 W. Tags: Surface Mount, Power Amplifier, Buffer Amplifier. More details for VNA-28B+ can be seen below.