... 1.3 gyroscopes from USA 2.lithium battery 3.6 years developing EC23 personal vehicle, thinking car, 2 wheel balancing scooter, self-balance ... .2 Mile13.Packing size: 842*548*655 mm 33.14*25.74*25.78in. 14.Lading: 224pcs/4OHQ 84 pcs/20FCL personal ... vehicle, 2 wheel balancing self-balance car, electric chariot, EC23