A. The product shell is made of materials and is equipped with a liquid crystal display. B. Functions: battery level indication, headlight control, power assist function, power assist gear, speed display, trip odometer/total odometer, travel time, conversion between metric and imperial units, fault indication. C. Applicable voltage: 24V, 36V, 48V. D. Applicable handlebar size: 22.2mm. E. Protection level: IP65. F. The appearance, text, and color of products in different batches may vary, but it does not seem to affect the use. G. Pins: 6 pins. H. Material: metal + plastic. I. Color: black. J. Package contents: - 1 liquid crystal display. - 1 sine wave controller (the color and appearance are random, and the specific color and appearance cannot be selected). K. Only the above package contents are included, and other products are not likely to be included. L. Note: Light reflection and different displays may cause some slight differences between the color of the items in the picture and the actual product. The allowable measurement error is around ±1 - 3cm.