The Rock Band 4 Stratocaster is an official guitar made for and bundled with Rock Band 4.
Much like it's younger brethren, it features a strumbar that actuates through the use of magnetic sensors, not actual switches. It also features a unique fret design where the frets are flush with the board, and pressing them depresses the surface lower than the other frets.
The Rock Band 4 Stratocaster does not have any wired variants; it is only available for the XB1 and PS4. XB1 versions of the guitar can work, but require external programs. PS4 versions of the guitar are compatible with Clone Hero over Bluetooth, but do not feature Tilt or Whammy functionality. The quality of the connection to the PS4 Stratocaster also depends on the Bluetooth adapter you use; many will lose signal or drop input easily.
If you really want to use a Stratocaster with Clone Hero, it is recommended that you use a 360 Stratocaster, wired or wireless.