This is an R156F 6-Channel 35MHz FM Receiver "Without Crystal" from Futaba.

It is NOT suggested to go below channel 16 with these receivers as you may experience interference.

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)
This covers the complete 35MHz band

INCLUDES:
One R156F 6-Channel 35MHz FM Receiver without Short Crystal

SPECS:
Narrow Band: 10kHz
Power Requirements: 4.8 to 6.0V (shared with servos)
Current Drain: 10mA
Length: 1.3" (33.3mm)
Width: 0.51" (13mm)
Height: 0.84" (21.4mm)
Weight: 0.36oz (10.2g)