This Ekewill GTX 4WD and it’s GS 2WD younger brother is the original invented prototype of this design by EkeWill Shenzhen China. Other Chinese Vendors such as AliExpress and Alibaba have recently copied EkeWill’s design with rudimentary parts and sub standard electronic components not to mention cheap Batteries, these are extremely dangerous. There are other Vendors in China recently also doing improved copies but are not offering anywhere near the same quality as the EkeWill GTX and GS All-Terrain EBoards.