The Gyrosphere reaches speeds of 5 mph and has a built-in computer monitor to identify the prehistoric wildlife that can be observed. To prevent harassing the animals, the vehicle will automatically roll backwards toward a safe distance if it is too close to an animal. Advanced invisible fence technology keeps the animals that are observed from roaming astray without the use of cages and bars that are unnecessary. According to Jimmy Fallon in the Gyrosphere instruction video, the glass is able to stop a 50 caliber bullet and can protect the guest from the venom spit of a Dilophosaurus.
The glass ball around the vehicle was added via special effects and was not actually part of the vehicle.