... operate,safe enough! 4CE ASTM! 2011 inflatable electric car bumper car 1Drive mode: The forward and the backward switches ... , play times, battery power, and the alarm for the last play time.5Battery: 12V, 60AH, ... two batteries which can be continued for 7-8 hours.6Charger: Output 24V intelligence quick ... Our factory can design and produce the track for the cars, they are strong, good quality ...