The IRM3040B from Technology Service Corporation is a RF Mixer with RF Frequency 10 MHz to 3 GHz, LO Frequency 3 to 4 GHz, IF Frequency 10 to 90 MHz, Image Rejection 27 to 37 dB, Conversion Loss 7.5 to 9.5 dB. Tags: Module with Connectors, Image Reject Mixer. More details for IRM3040B can be seen below.