The Black Series Remote Controlled Speed Bumper Cars - Yellow & Red by Merchsource TWO RADIO CONTROLLED SPEED BUMPERS WITH CRASHING SOUND EFFECTS WIRELESS REMOTE NEW. Omni-directional operation for fluid movement and speed. Rider ejects when bumper is hit. Built-in crash sound effects. Set includes two vehicles and two wireless remote controllers. Each car requires three AAA batteries (not included). Each remote requires two AAA batteries (not included). Each car measures about 5 inches long by 4 inches wide by 4 inches tall.