Usage Tips:5S Protocol 24V 36V 48V LCD C600 Big 4 Inch Big Screen Electric Bicycle Display with Waterproof Con Model: C600 Waterproof Connector Voltage: 24V 36V 48V Agreement: 5S protocol. Work with controller which has the same agreement.Before purchasing, please confirm whether the controller is consistent with the displayed agreement Q&A Q: Why can't it be turned on? Answer: Check whether the connection between the instrument wiring harness and the connector of the controller is firm. Q: How to deal with the fault code displayed by the instrument? Answer: First, find out the corresponding problem according to the displayed error code. If you can't solve it by yourself, you should go to the electric vehicle maintenance point for repair in time. Colour: Black Material: Plastic Package Contents: 1 x LCD C900 display Only the above package content, other products are not included. Note: Light 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.