The 6139-5521-00 from Crane Aerospace & Electronics is a RF Transceiver with Output Power(dBm) 1 dBm, Rx Sensitivity -70 dBc, Supply Voltage 9 V, Tx Current 75 mA, Noise Figure 1.5 dB. Tags: Module with Connector, Module. More details for 6139-5521-00 can be seen below.