Double protection: The airspeed sensor is equipped with a protective shell to protect the internal components from damage. Quality performance: Our digital airspeed sensor kit is made of high-quality material, which is durable and has a long service life. Effortless install: Our digital airspeed sensor kit is easy to install and disassemble. just put the sensor into the pc, plug it in and start using it. Set: B-1 x Airspeed module Application: For simultaneously calibrate the throttle range of ESCs on a multi-rotor. Use: Vehicles & Remote Control Toys Material: plastic+metal colour: As Shown Package Contents: 1 x Airspeed module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.