This is the Futaba R617FS 2.4GHz FASST 7 channel receiver, and is intended for use with Futaba 2.4 GHz FASST airplane radio systems. Features: High sensitivity receiver weighs only .25oz (7g) without case yet is a full range system for all aircraft from giant scale to park flyer applications-no need to buy separate receiver for specific aircraft Simple one-touch linking - no plugs to mess with or lose Dual Antenna Diversity allows 2.4GHz FASST Futaba transmitter to select the best reception between the two receiver antennas with no signal loss Rubber grommets installed where antennas exit to eliminate stress and fraying of the two antenna wires One year limited manufacturers warranty Specifications: Size: 1.6x1.1x.35" (40x27x9mm) Power Requirement: 4.8 - 6V Current Drain: 80mA (at no signal), 74 mA (w/signal no servos on 4.8) Weight: 0.34oz (9.8g) with case, 0.25oz (7g) without case