Built for the largest 1S brushless quadcopter with seven colors for choice. Featuring motor holders for convenient installation, and it has an improved battery slot, which makes a larger capacity 1S battery available. This really does improve stability and smoothes out the flight. Fit out with F4 1S 5A FC, 1102 and 45mm propellers, Meteor75 Pro Brushless Whoop Frame has an excellent thrust-to-weight ratio performance suitable for 1S HD whoop.