Air Outlet Negative Clamp (Black) Positive Clamp (Red) Temperature Sensor (up to 65 ° C / 149 ° F ) Buckle for Filter TIP: Please clean the filter every six months and keep it dry. This product is not waterproof. 9-Step Charging Process Voltage Value Voltage Selection Error Charging Time OV- Over Voltage OT- Over Temperature SC- Short Circuit OC- Over Charge Current Value RVS- Reverse Polarity TIP: If any error occurs during the charging process, the corresponding prompt will be shown on the display. Please disconnect the charger and check your battery. Do not charge again until the problem is solved. Charging Capacity