The MST-100 from General Dynamics Mission Systems is a Satellite Transponder with Input Voltage 21 to 36 V, Mass 2.72 Kg, Noise Figure 2.5 to 2.8 dB, Vibration 25 Grms, Power Consumption 44 to 46 W, 10 W (Rx). More details for MST-100 can be seen below.