This is the Futaba R153F 3-Channel FM Micro Receiver.

FEATURES: 
Ideal for 1/18 scale and larger cars, trucks and boats
Small size
Light weight
One year limited warranty

INCLUDES: 
Futaba 3-Channel FM Micro Receiver

REQUIRES: 
- Futaba FM receiver crystal FUTL61** for 27MHz
- Futaba FM receiver crystal FUTL64** for 75MHz

SPECS:    
Length: 1.5" (37.7mm)
Width:  1.0" (25.6mm)
Height: 0.6" (14.3mm)
Weight: 0.50oz (14.1g)