The FLM4450-4F from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 4.4 to 5.0 GHz, Power 35.5 to 36.5 dBm, Power(W) 3.55 to 4.47 W, P1dB 35.5 to 36.5 dBm, Power Gain (Gp) 10 to 11 dB. Tags: Flanged. More details for FLM4450-4F can be seen below.