It features a quad-rotor design with detachable propellers guards to protect against light collisions. To pilot the U842, a 4-channel, 2.4 GHz handheld transmitter (radio controller) comes in the box and is pre-bound to the aircraft, making this bundle ready-to-fly. The copter sports to speed modes, a high speed mode for more advanced pilots or to compensate for windier conditions and a low speed mode ideal for beginners. Perform flips and 360-degree rolls with the press of a button Includes 2.4 GHz transmitter (radio controller) Included battery lasts up to 8 minutes and features a USB charger 6-axis gyroscope provides flight stability LED indicator lights to aid in orientation, especially at night Slot-in battery design to make battery swaps fast and easy High and low speed modes to accommodate different skill levels and varying amounts of wind resistance Low voltage alarm produces audible tone at the transmitter warning you to land the aircraft as soon as possible