This LOT is one each of New Mini Circuits Surface Mount Level 13 Frequency Mixer, Part Number: RMS-42MH. New sold at Mini Circuits for $24.95 each. I have PCB for this Mixer link below.

General Spec for RMS-42MH:

• LO/RF Frequency: 800MHz - 4200MHz
• IF Frequency: DC-800MHz
• LO Driver Level: +13dBm
• Conversion Loss: 5.3dB (typ)
• LO-RF Isolation: 36dB (typ) for Low Band, 28dB (typ) for Upper Band
• LO-IF Isolation: 18dB (typ) for Low Band, 15dB (typ) for Upper Band
• Input IP3: +19dBm
• P1: +9dBm
• Maximum Input Power (no damage): +23dBm
• Operation Temperature Range: -40C to +85C
• Surface Mount Package: Case Style TT240 (0.31"x0.25"x0.20")