VTech Go! Go! Smart Wheels Press & Race Monster Truck Rally Parents' Manual page 16

Caution: Changes or modifications not expressly approved by the
party responsible for compliance could void the user's authority to
operate the equipment.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) T HIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED
OPERATION.
CAN ICES-3 (B)/NMB-3(B)
16