The MLFI-41002 from Micro Lambda Wireless, Inc. is a Tunable Filter with Tunable Frequency 1 to 2 GHz, Bandwidth 20 MHz, Rejection 80 dB, Insertion Loss 5 dB, Supply Voltage 20 to 30 Vdc( Heater Voltage). Tags: Module with Connectors, YIG Filter. More details for MLFI-41002 can be seen below.