Small cooling fan for radio-controlled cars, H40G-E model. - Model: H40G-E - Fan Size: Small - Power Connector: Battery connection - Application: Cooling fan for radio-controlled cars Thank you for viewing. I myself do not have any knowledge of this product. I don't even know if it works, so it is treated as junk. Please understand that this is a used item. If you would like to see other areas, please comment. Thank you. Price negotiations are possible.