The SE2574BL-R from Skyworks Solutions is a RF Amplifier with Frequency 2.4 to 2.5 GHz, Small Signal Gain 25 to 29 dB, Gain Flatness ±0.5 to ±1.1 dB, Output Power 18.5 to 21 dBm, Output Power 0.07 to 0.13 W. Tags: Surface Mount, Power Amplifier. More details for SE2574BL-R can be seen below.