This product realises the calibration and adjustment of the data of the handle rocker, using the chip processing to obtain the for original-signal of the handle rocker, and then outputting the correct signal to the handle to realise the calibration function. It can adjust the parameters of the joystick at any time, and has good consistency of maintenance effect. At present, it supports the calibration of Hall induction joystick and traditional carbon film joystick. For the rocker itself comes with the central mechanical error has no correction effect, the built-in program does not add any dead zone settings. It is recommended to work with the non-drift characteristics of Hall rocker to achieve the high life and precision requirements of the rocker. Due to different product batches, the appearance may be different, which does not affect use. Type:A:For XBOX, Left FOR XBOX left side special type: This model is mainly to correct the for XBOX controller LT button on the joystick to produce a slight interference,redesigned circuitry and procedures and produced a special model,can significantly reduce the interference. At present, it works best with the joystick in the link, and will be expanded to adapt at a later stage. Colour:As Shown Material:PC+Metal Package Contents: 10 * Calibration board 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.