US Ship Walkera mini 3D 3G 6-CH Super CP Rc Helicopter W/Devo 7E TX (RTF)-Mode 2 The flybarless design characterizes low power loss and great improvements in efficiency. Sophisticated 3-Axis gyro flybarless stabilization system automatically adjusts the controls for stable flight ,Highly developed low voltage drive system provides a green, environmentally friendly and safe power solution Mini size helicopter for indoors, providing 5-6 minutes of flight time after a full charge The RX firmware can Update Online (required UP02 upgrade cable and adapter ). Telemetry function can be accomplished after update the RX firmware. The Telemetry helps you get a real time data feedback about the Battery Voltage.(A telemetry function Radio is a must)