17A -mode controller. Controller kit for 350W motors. And suitable for DIY electric bicycles, electric cars, electric , folding cars, etc. The bicycle lithium battery conversion kit greatly enhances the driving pleasure, suitable for bicycle lovers. For UART2 communication protocol Great features: While driving, this product displays a lot of useful data about the bike, such as on/off button, light switch, battery level indicator and other features. The instrument has a display. Excellent performance: The UKC3 meter is made of high-quality material, which is light, strong, well-crafted, tough, and waterproof, providing excellent protection for the internal circuit. Good heat dissipation: The controller shell is made of high-quality material, with concave design, good heat dissipation, and protects the internal circuit from the influence of heat load. Material: metal+plastic colour: As shown Package Contents: 1 x controller 1 x instrument 1 x finger handle 1 x boost sensor 1 pair off brake lever Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.