WLtoys is a registered brand of Shantou Chenghai Welei Toys Industrial Co. based in China. They have specialized in Quads since 2011, with famous models such as V959, V222 and V252. One thing that they focus on is spare parts. They understand the practical aspects of drone flying, and thus concentrate on support and after sales-service.
WL Toys offers some really small quad copters, but one must not underestimate their power. The company offers good quality products that are suitable for both indoor and outdoor flying, but only in moderate winds. The remotes have adjustable sensitivity to fit your response mechanism with ease.