It’s made by our precise and exclusive patent private mold, instead of rough and non patent-protected public mold. All are made by first-hand raw materials (including but not limited to: first-hand plastic, first-hand electronic components,first-hand IC chips).The battery is convenient for quick-exchange and quick-charge, it has modular design and the power indicator which can display the amount of power, also has long endurance: more than 6 minutes flight time per time (Level A product and with double protection, there will be no risk of overcharging). Small size, big energy, easy to carry, and sufficient power.