The Cannon Blaster was a Shen Gong Wu that launched its user as a human cannon ball.
The Cannon blaster was a small bronze cannon. It had a golden ring coating around the firing hole in a wave pattern. It had two black wheels with ruby rims. The trigger itself was also in gold.
When activated, it would intake the user(s). It would then fire the user(s) in a small human cannonball. The ball was the color of whatever the user wore. It would then launch itself to its user(s). It can launch multiple users as once, making the 'cannonball' extremely strong or launch the users as multiple cannonballs.
It first revealed inself right as the Heylin Eclipse ended. The monks had decided that it was better if "Jack Spicer" competed for it, as that would put all of Hannibal and Chase Young's focus on him. Despite this, he would be knocked out forcing Kimiko to use the Treasure of the Blind Swordsman to diguise herself and compete in his place. She would win this Shen Gong Wu after pitting Chase against Hannibal in the showdown. 
Later on in an alternature future, it was used by the elderly Clay Bailey against the Jack-Bots and to help Raimundo Pedrosa, Omi and Clay to get to where Jack's Shen Gong Wu vault was located in order to get the Sands of Time.
Afterwards in an alternate past, it was used by all four Dragons to go underground to the Heylin Seed's vault where Omi and Dojo froze themselves. Raimundo would also wager the Cannon Blaster in a Cosmic Clash showdown soon after.