The A-GABL1-3139-B5B5 from ETL Systems is a RF Amplifier with Frequency 850 MHz to 2.15 GHz, Gain 10 dB, Gain Flatness ±0.4 to ±0.8 dB, Noise Figure 7 dB, Output Power 12 to 15 dBm. Tags: Gain Block. More details for A-GABL1-3139-B5B5 can be seen below.