Smart Bike D1 light smart bike high speed smart bike foldable smart bike smart bike factory smart bike manufacturer This new DYU smart bike D1 has a stylish appearance, front & back light and the function of constant speed cruising, is lightweight, safe and practical for commuting use. Features: Aircraft-grade aluminum alloy frame, excellent quality and high performance; IP54 waterproof, practical usage even in bad weather; Smart App controlling ( scanning the QR code in user manual ), cruise control and battery management system; Bright front light and back light, increasing cycling safety in night; Folding design, space-saving and portable to carry; Powerful 250W motor, large battery capacity and strong loading ability, meeting your needs.