Ergonomically designed, fit most vehicle cup holders. 12V stainless steel car heating cap sits snugly in your car cup holder and plugs into the cigarette lighter to keep your drink warm. Heat function and practical, maintains a temperature of 65C. No batteries required, just plugs in to your dashboard lighter.Note: The input power of this product is 60W (12V / 5A). Please confirm that the output power of the cigarette lighter is greaterthan 60W before purchase, otherwise it will stop working due to the overload protection of the cigarette lighter CONSTANT TEMPERATURE TECHNOLOGY-Auto Electronic Heated Travel Mug, 450ml 15.2fl oz Capacity Enough For Personal Use, Intend To Heat And Keep Your Hot Water, Coffee, Milk, Tea Or Other Beverages Warm At Right Temperature Around 65 Degrees. VEHICLE SPECIAL TOOL-Great Insulation Effect, Firm Plastic Handy Handle, Detachable Standard 12V Auto Adapter Car Cigarette Lighter Plug Included, Suitable For All Car Power Supply, Line Length Enough For Car Interior Space, Fit Most Vehicle Cup Holders. ANTI-LEAK & ANTI SLIP BOTTLE WARMER: Designed with sealed rubber band on the lid to prevent liquid spilling out and improve the efficiency of warming; Anti-slip rubber base, keep the cup stable.