ROBOLINK (Model:Codrone II) CoDrone II is a DIY product that can separate parts, adding sensors or replacing parts and reassembling. PERFORMANCE : Flight time up to 7 minutes. Various Sensor Extension. Flight Control by RF Communication. RF Control up to 50M. 3-Axis Acceleration & 3-Axis Gyro Sensor. Optical Flow Sensor for Hovering. Flight Control by RF Communication. Altitude Measurement by Distance Sensor. Altitude Control by Air Pressure Sensor.