This is the Futaba R6004FF 2.4GHz FASST 4-Channel Micro Receiver.
Compatible with the following FASST transmitters; 6EX, 7C, and the
following transmitter modules; TM7, TM8 (on 7 channel mode),
TM10 (on 7 channel mode) and TM14 (on 7 channel mode).

FEATURES
Designed for short range application such as indoor aircraft only
Limited flight range of 300 ft (91.4m) maximum
Compatible with standard size connectors only
Easy one touch linking to transmitter
One year limited warranty

INCLUDES
Futaba R6004FF 2.4GHz FASST 4-Channel Receiver with set up sheet
REQUIREMENTS
Installing in model and connecting servos and ESC

SPECIFICATIONS
Dimensions: 0.81 x 1.39 x 0.30" (20.5 x 35.3 x 7.5mm)
Weight: 0.13oz (3.8g)
Power Requirement: 4.0V- 8.5V (although this receiver can be used at
8.5 volts, Futaba recommends you follow the voltage specs of your servos).
F/S and Battery F/S function (for channel three)
Battery F/S Voltage: 3.8V
Approximate range of 300 ft (91.4m)
Antenna Length: 1"