Developer - Xerall
"The X-TANKCOPTER: First Ultimate All-terrain Drone" on Indiegogo
"B-Unstoppable world first Tank Quadcopter Drone" on Kickstarter
"B-Unstoppable World's First Tank-Quadcopter Drone" on Indiegogo
"The X-TANKCOPTER: First Ultimate All-terrain Drone" on Indiegogo
"B-Unstoppable world first Tank Quadcopter Drone" on Kickstarter
"B-Unstoppable World's First Tank-Quadcopter Drone" on Indiegogo