This is the Micro 4-Channel Receiver for the Traxxas E-Maxx.
FEATURES: 27MHz AM operation Replaces damaged receiver
INCLUDES: Installing in vehicle and connecting servos and battery
SPECS: Length: 1.5" (38.5mm) Width: 0.98" (25mm) Height: 0.83" (21.3mm)
REQUIRES: Crystal to match transmitter frequency