The MLFR-0204 from Micro Lambda Wireless, Inc. is a Tunable Filter with Frequency DC to 8 GHz, Tunable Frequency 2 to 4 GHz, Bandwidth 15 MHz, Rejection 40 dB, Input Power 10 to 30 dBm. Tags: Module with Connectors, YIG Filter. More details for MLFR-0204 can be seen below.