This is the Futaba R617FS 2.4GHz FASST 7-Channel
Park Flyer to Giant Scale Aircraft Receiver.

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 binding - 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 warranty

INCLUDES: Futaba R617FS 2.4GHz FASST 7-Channel Receiver

SPECS:    Size: 1.6 x 1.1 x .35" (40 x 27 x 9mm)
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