The HMC399MS8 from Analog Devices is a RF Mixer with RF Frequency 0.7 to 1.0 GHz, LO Frequency 880 to 960 MHz, IF Frequency DC to 0.25 GHz, Conversion Loss 8.5 dB, LO Drive - Power 17 dBm. Tags: Surface Mount, Single Balanced Mixer. More details for HMC399MS8 can be seen below.