COMPATIBILITY: Compatible With Surface 3 Model 1623 1624 1645 1657 | SPECIFICATION: AC Input: 100-240V 50-60Hz, DC Output: 5.2V 2.5A | Authoritative Certification: Passed Many Well-Known Certifications Around The World, Such As Ce/Fcc/Ul/Bs/Tuv/Rohs, Etc. | RELIABILITY: Our Products Will Charge Your Device as Efficiently As the Original Charger, or Any Other Replacement | Bold Wire: Use Thick Pure Copper To Make Wire, And Adopt The Technology Of Positive Standard Low Voltage Drop To Ensure Stable Voltage Output And Not Damage The Equipment Using This Power Adapter.