The RTL-4-6020 from Radar Technology is a DLVA with Frequency 50 to 70 MHz, Dynamic Range 80 dB, Input Power -80 to 0 dBm, Supply Voltage 15 VDC, Operating Temperature -30 to 71 Degree C. Tags: Module with Connector, DLVA. More details for RTL-4-6020 can be seen below.