The IRM0511B from Technology Service Corporation is a RF Mixer with RF Frequency 10 to 550 MHz, LO Frequency 550 MHz to 1.1 GHz, IF Frequency 10 to 90 MHz, Image Rejection 27 to 37 dB, Conversion Loss 8.5 to 10.5 dB. Tags: Module with Connectors, Image Reject Mixer. More details for IRM0511B can be seen below.