The Drone World just got interesting. For the last few years our Multi-Rotor ESCs have been providing R/C enthusiasts with some of the most versatile and inventive systems ever devised. We were just getting started! We are excited to introduce our V5 software upgrade which will make your Castle Multi-Rotor 25 and 35 ESCs seem like entirely new products! #drones#multirotorV5#rc#poweredbycastle
http://www.castlecreations.com/products/quadpack.html
http://www.castlecreations.com/products/quadpack.html