This is a 00801-0972 battery charger for Power Wheels cars.
The input voltage on this 00801-0972 electrical plug is 120v AC 60Hz 28W.
The output voltage on this transformer is 12V DC 1.2A Amps.
You better buy an extra power supply because: 1) This power cord is going to get lost. 2) Your kid will drive away with the wall charger connected and break it. 3) Kids are going to play with this and break it. They will find a way. Count on it happening; be prepared.