The MDL550 from R & K Company Limited is a RF Mixer with LO Frequency 1 MHz to 2 GHz, IF Frequency DC to 1 GHz, Conversion Loss 8 to 10 dB, LO Drive - Power 7 dBm, P1dB 7 dBm. Tags: Drop-In, Double Balanced Mixer. More details for MDL550 can be seen below.