5,New upgraded Slim Design:Light,Small, The innovative chip program makes the product more compact and lighter, avoiding heat generation,More safe and reliable.It is So Light Which is An Incredibly Small Footprint the Laptop AC Travel Adapter Slips into Bags, even Pockets with Ease While You Go Anywhere. 4,Automatic Protection:Built-in intelligent and safe circuit protection chip ,accurate control voltage.UL/CE/FCC/CC/RoHS Certified.manufactured with the highest quality materials and include multiple smart features safeguarding Provide PTC/Cyclic/Over-Charging/Over-Voltage/Over-Temperature/Over- Current/Short-Circuit/Over-Discharge Protection.the use effect is the same as the original power adapter.You can rest assured to use. 3,Safety:Passed UL/CE/FCC/ROHS Certified.The Leading American Consumer Product Testing Laboratory Lists this product as Meeting Their Standards for Electrical Safety and Design in The United States. 2,Widely Compatible:There are 2 different DC connector fit for most latop Output DC: 20V 6.75A 135W and 20V 3.25A 65W. (Please check the specific model in Product Compatibility). 1,Technical specifications:170W power adapter is with Rectangle USB Tip. Input Volt Range: 100-240V, 50/60HZ (for worldwide use) .Output DC: 20V 8.5A for 170W. NOT COMPATIBLE with 230W and 300W.