The brake controller is required to be a low-speed brake. Made of high quality material, durable and practical to use. This product needs to be connected to the same battery as the controller, otherwise the function cannot be started. The rear light can be connected either to the controller or directly to the battery. Note: This product is not suitable for and TSDZ middle motors. Color: black+red Material: aluminum alloy + plastic Package Contents: 1 x front light 1 x rear light 1 x button 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.