Cheerson CX-20 / Quanum Nova - 3 versions of the CX-20 are available on the market : the Open Source version, the Zero Tech version and the Big Shark Flight version. Firmware :
![Amazon.com: Quality Cheerson CX-20 Open-source Version Auto-Pathfinder Quadcopter RTF (Left Hand Throttle) by ZurarakShop : Toys & Games Amazon.com: Quality Cheerson CX-20 Open-source Version Auto-Pathfinder Quadcopter RTF (Left Hand Throttle) by ZurarakShop : Toys & Games](https://m.media-amazon.com/images/I/41Q-ueJLigL.jpg)
Amazon.com: Quality Cheerson CX-20 Open-source Version Auto-Pathfinder Quadcopter RTF (Left Hand Throttle) by ZurarakShop : Toys & Games
![The Quanum Nova CX-20 Quadcopter ready to fly just before a coastal... | Download Scientific Diagram The Quanum Nova CX-20 Quadcopter ready to fly just before a coastal... | Download Scientific Diagram](https://www.researchgate.net/publication/319504363/figure/fig1/AS:535587729797120@1504705473306/The-Quanum-Nova-CX-20-Quadcopter-ready-to-fly-just-before-a-coastal-mapping-mission.png)