The adjustable speed controller unlocks 38km / h top speed for scooters through secure software optimization, featuring double speed modes ( 20km / h default & 38km / h upgrade) for customized riding This scooter speed controller strictly operates as an aftermarket electric scooter upgrade, prioritizing user responsibility for regional regulations and hardware compatibility checks before activation Designed for electric scooter owners and enthusiasts seeking upgrades in private environments, requiring technical awareness of motor specifications ( 250W / 350W+) for optimal speed adjustments Crafted with housing, this plug and play scooter speed controller modifies firmware settings via preset modes while maintaining compatibility for seamless integration Ideal for controlled private roads, closed campuses, or recreational areas where riders can safely explore enhanced acceleration capabilities beyond factory limitations, Manufacturer: XAGMODSHN