The coaxial rotor head design with counter-rotating main blades and a sturdy, flexible flybar offers reassuring durability and flight stability. The LiPo flight battery recharges easily using the supplied USB-compatible charger. On a full charge, you'll enjoy 7-8 minutes of uninterrupted flight time. At only 9 inches (226 mm) long, the Axe 100 CX is ideal for flying indoors. Its simple, sturdy construction is perfect for first-time pilots. It's easy to install the LiPo flight battery. Keep an extra charged battery on hand for quick exchanges and stretch your flight times!