Adjust Voltage and Current Automatically- Prevent over current, over voltage and over heating. You can power most difference brand laptops with one universal laptop charger. NOT FOR ALL LAPTOPS. 12 tips enable most models compatible but not all Please do not charge laptop over 65W. Wide Output Voltage, 5v / 18.5v-20v- Compatible laptop power adapter 65W 45W 40W 33W 24W. NOT FOR ALL NOTEBOOKS. Each brand laptop has several different kinds of tips for different models. If you are not sure your laptop tip size, Please send your laptop brand and model number to us before buying, We will give Suggestions. Any problems, Please contact us before return. Compatibility- Compatible For Dell Inspiron 11 13 14 15 3000 5000 7000 Series with N42 TIP ( 4.5 x 3.0 mm inside pin ), Inspiron 11-3162 3050 3152 3157 3169 3459 3458 3451 3452 3551 3552 3567 3558 5368 5378 5451 5452 5455 5458 5551 5552 5555 5558 5559 5567 5568 5755 5758 5767 5759 7352 7353 7359 7368 7378 7460 7560 7568 7579 , Vos