The plug has a diameter of approximately 0.31 inch and features a Mini 3-prong design. Confirm plug compatibility before placing an order. Compatible only with 36V Lithium Battery. Please be aware that this charger is not compatible with Razor scooters or dirt bikes and should not be used with Lead Acid battery. Input: 100-240VAC,50/60Hz,2.5A (MAX). If you receive a broken item, please do not use it. Contact me for a replacement or refund. For any issues with the product, feel free to reach out. Output: 42V 2A, Mini 3-prong Inline Connector, 8mm in size. Red light indicates charging, green light means fully charged or disconnected. Includes 1pc 42V 2A replacement scooter charger, 45 days hassle-free replacement, and 12 months warranty.