Safety Guarantee: USNINFLY Dual USB Wall Charger Block is certified according to a UL standard (not by UL). With premium PC Fireproof material&smart system, against over charging, over currents, and over heating. | Active Design: Our USB Plug with premium metal strip, which match all USB Cable and cell phone(Especially the a pple Phone). Have Red, Gold, Silver, Rose Pink, Gray, Jet Black Color makes your charger automatically stands out from other charger.You can share them with your lover, family or friends. | Broad compatibility：Our Charger Cube design to work with all USB-powered devices. Such as iphone x 8 7 6 Plus 4 5S, Samsung Galaxy S9 S8 S7, and more android cell phones. | Premium Performance: Output with total current 2.1A/5V and Input with 100-240V allows you to charge two mobile devices simultaneously at high speed. It really save your time and convenient for you to charge at home, in office or during travel. | What You Get: 4-Pack UL Certified Charging Cube(Black) and friendly customer service. Please feel free to contact us if you have any question, our customer service will respond to you within 24 hours.