This is the Futaba R149DP 9-Ch 72 MHz PCM 1024 Dual Conversion Receiver.
Narrow band spacing and dual conversion signal filtering combined to provide exceptionally clear interference free reception and amazingly smooth and accurate control.
One 72 MHz FM Dual Conversion Receiver Crystal.
Narrow Band: 20KHz Intermediate Frequency 1st IF: 10.7MHz 2nd IF: 455kHz. Power Requirements: 4.8 to 6.0 volts (shared with servos),Current Drain: 15mA.
Length: 2.16" (55.0mm)
Width: 1.28" (32.6mm)
Height: 0.82" (20.8mm)
Weight: 1.2 oz (34.5g)