The FLM5964-4F/001 from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 5.85 to 6.75 GHz, Power 36.5 dBm, Power(W) 4.47 W, P1dB 36.5 dBm, Power Gain (Gp) 9.5 dB. Tags: Flanged. More details for FLM5964-4F/001 can be seen below.