The MDH540 from R & K Company Limited is a RF Mixer with LO Frequency 0.1 MHz to 3 GHz, IF Frequency DC to 1 GHz, Conversion Loss 5.5 to 11 dB, LO Drive - Power 17 dBm, P1dB 9 dBm. Tags: Drop-In, Double Balanced Mixer. More details for MDH540 can be seen below.