The IRM2040B from Technology Service Corporation is a RF Mixer with RF Frequency 10 MHz to 2 GHz, LO Frequency 2 to 4 GHz, IF Frequency 10 to 90 MHz, Image Rejection 25 to 35 dB, Conversion Loss 9.5 to 11.5 dB. Tags: Module with Connectors, Image Reject Mixer. More details for IRM2040B can be seen below.