IncrediblyDurable: Tangle-free nylon cord with aluminum casing has a 4000+ bend lifespan, several times longer than original device cables. ENHANCED CONNECTIVITY Each iPhone and iPad cable we make is 3.3 feet long and made with professional-grade, Apple MFI certified braided cable wrapped in nylon; all to ensure faster, more reliable connections. SURGE & OVERCHARGE PROTECTION This USB cable comes with an MFI certification that detects your cellphone, tablet or other mobile devices proper power requirements and protects it from overcharging and power surges.