The PM-21-411 from Pulsar Microwave is a RF Mixer with LO Frequency 870 to 970 MHz, IF Frequency 70 MHz, Conversion Loss 7.2 dB, LO Drive - Power 17 dBm, IP3 28 to 31 dBm. Tags: Module with Connectors, Triple Balanced Mixer. More details for PM-21-411 can be seen below.