This is the Futaba R124H AM 4-Channel Mini Receiver without Crystal.

FEATURES: 
Narrow-band spacing and superior signal filtering combine to provide exceptionally clear, interference-free reception and amazingly smooth, accurate control.
One year limited warranty

INCLUDES: 
One Futaba R124H AM 4-Channel Mini Receiver without Crystal

REQUIRES: 
- One AM 27MHz crystal, FUTL46** for 27MHz
- One FUTL47** (Low band crystal) or FUTL48** (High band crystal) for 72MHz w/o Short Xtal
- One FUTL49** receiver crystal for 75MHz

SPECS:    
Length: 1.5"   (37.5mm)
Width:  1"     (25.6mm)
Height: 0.60"  (15.3mm)
Weight: 0.52oz (14.8g)
Range: 650ft (maximum - 27MHz)