Gomadic Dual DC Vehicle Auto Mini Charger designed for the Nextbook Premium7 Tablet - Uses Gomadic TipExchange to charge multiple devices in your car Extremely compact and with a powerful advanced circuit design that provides precision voltage and current regulation specific to the Nextbook Premium7 Tablet (accurate to 0.1v). Secondary charging port is available for optional charging of second device. Advancements in circuit minimization provide a full 10W of available charging current to an adapter comparable in size to a US quarter. Considerably higher available current (2000mAh) when compared to standard Nextbook Premium7 Tablet vehicle chargers. Integrated TipExchange Technology protects your investment by providing a mechanism to change/upgrade your charger by simply swapping the physical charging tip. Nextbook Premium7 Tablet specific tip as well as standard microUSB and Female USB tips included. Additional tips sold separately. When charger is not connected, Gomadic ""Power Sleep"" feature cuts latent power draw by over 99% Engineered using select, high quality circuit components to eliminate interference with FM radio transmissions. Tested under a rigorous Q&A process.