Intocircuit&reg; AC Adapter Battery Charger for Acer Aspire Ultrabook S5-391 S7 S7-391 S7-191 S5-391-6419 P3 P3-131 P3-171 Power: 65W; Power Input: AC100-240V; Output: 19V 3.42A;Connector Tip: 3.0mm*1.0mm. Please ensure the DC output and connector size matches your original adapter before purchasing. Protection:multiple-lever overload, over-voltage, and short circuit protection;Efficiency:high energy conversion rate to save energy and be environment friendly;Quality:minimum voltage ripple ensures steady power output -better feeds your laptop; Compatible : Acer Chromebook C720, C720P, CB3, CB5; C720-2800, C720-2848, C720-2802, C720P-2600, C720-2844, C720P-2625, C720-2420, C720P-2666, C720-2827, C720P-2834, C720P-2661 ZHM 11.6" HD Google Laptop; Aspire S7, P3, S5, S7-392, S7-391,PA-1650-80, NP.ADT11.00F Package includes: 1 pcs Intocircuit AC adapter, 1 pcs 3 prong AC power cord; Full 2 Years Warranty! Please contact us with any questions or concerns - we are here to help