Futaba R168DF FM DC 72MHZ Receiver without Crystal FEATURES: Strong interference free reception for all 4+ channel Futaba FM systems Narrow band spacing and Dual Conversion signal filtering INCLUDES: 72MHz (ch 11-60) Futaba R168DF 8-Channel FM Receiver REQUIRES: One 72MHz Receiver Crystal, (ch 11-35) FUTL57 Low Band, OR (ch 36-60) FUTL58 High band