Introducing the Yiyun YK40 Motor Controller, designed to provide you with a reliable and efficient electric bike experience. This controller is compatible with 24V batteries and can handle up to 350W of power. It is perfect for those who are looking for a high-quality electric controller that can meet their needs. The Yiyun brand is known for its outstanding performance and durability, making it a great choice for cyclists who want to upgrade their bikes. This model, the Yiyun YK40, is a reliable and efficient electric controller that can help you achieve a smoother ride. It is suitable for use with electric bikes and can be easily installed with the necessary accessories. Get your hands on this amazing product today and take your cycling experience to the next level!