Quad Copter 2.4Ghz 4CH X-axis Helicopter RC Gyro Mini Beetle 9128 4 Channel Omni-directional fight: up / down, forward / backward, left / right and rollover 2.4GHz Spread Spectrum Technology Mode I/II Changeable Transmitter Built-in 3-axis Gyroscope System Removable 3.7V Li-poly Rechargeable Battery