The MDL500 from R & K Company Limited is a RF Mixer with LO Frequency 2 kHz to 50 MHz, IF Frequency DC to 50 MHz, Conversion Loss 6 to 8.5 dB, LO Drive - Power 7 dBm, P1dB 1 dBm. Tags: Drop-In, Double Balanced Mixer. More details for MDL500 can be seen below.