Airspeed sensor (Prandl tube).

Spektrum is a brand from the American company Horizon Hobby. "Spektrum" is a RC Radio System revolutionizing the 2,4 GHZ RC industry. With Spektrum, Horizon Hobby was one of the first companies worldwide to offer the 2,4 GHZ technology and telemetry. Today, Spektrum is widely known as one of the best on the market in RC Radio Systems. Many Horizon Hobby models can be instantly connected with Spektrum remotes via BNF (Bind and Fly) such as Blade, E-flite, Hangar 9, hobbyzone, parkzone, or Vaterra products.