The IRM1214B from Technology Service Corporation is a RF Mixer with RF Frequency 10 MHz to 1.2 GHz, LO Frequency 1.2 to 1.4 GHz, IF Frequency 10 to 90 MHz, Image Rejection 30 to 40 dB, Conversion Loss 8.5 to 9.5 dB. Tags: Module with Connectors, Image Reject Mixer. More details for IRM1214B can be seen below.