This is a R114F 4-Channel HI 72MHz FM Receiver "Without Crystal" from Futaba.
FEATURES: Narrow-band spacing and superior signal filtering combine to provide exceptionally clear, interference-free reception and amazingly smooth, accurate control. Perfect for Park or Slow Flyers. Range of approximately 650 feet (200m)
INCLUDES: One R114F 4-Channel 72MHz FM Receiver without Short Crystal
SPECS: Narrow Band: 20kHz Power Requirements: 4.8 to 6.0V (shared with servos) Current Drain: 10mA Length: 1-1/4" (31.75mm) Width: 1/2" (.02mm) Height: 7/8" (.28mm) Weight: 0.35 oz (9.9g)
COMMENTS: Special Notice about Frequency Changes- *72MHz- Low band channels 16 to 35; High band channels 36 to 60. Receiver crystal channels (16-35 or 36-60) Within Each Band Can Be Changed, and Do Not Require a retuning of the receiver. *72MHz Frequency Band (Low or High) for the receiver Can Not Be Changed from Low to High band, OR from High to Low band without sending it into Futaba Services for retuning. *50MHz, 72MHz, 27MHz and 75MHz Frequency Bands Can Not under any circumstances be interchanged with each other. The receiver Must be sent in for retuning to the appropriate band. *50MHz, 27MHz and 75MHz receiver crystals Can be changed anywhere within the respective bands. There are no High or Low bands such as the 72MHz band has. *Transmitter Crystals Can Not be changed to another channel except by a licensed service center. It is against FCC regulations, and illegal for the user to change a frequency determining component of a transmitter. If a radio is not retuned, it can be a hazard to spectators, modelers or property, and void AMA insurance coverage. *Check with the local R/C club for the frequencies used in your area.