The RT-2087/ZPX-1 from uAvionix Corporation is a Identification Friend or Foe (IFF) with Input Power 3.5 to 5.5 W, Output Power 250 W, Peak Power 6 W, Sensitivity -80 to -76 dBm ±2 dB, Supply Voltage 11 to 33 V. Tags: Transponder. More details for RT-2087/ZPX-1 can be seen below.