Topoint 3 Pack Gold Plated 3.5mm Headset Audio Jack Extender; Headphone Adapter for Battery Charger Case, Power Case, Juice Pack for Smartphones, Tablets Made for devices with 3.5mm (1/8 inch) headset audio input, including iPhone or Android smartphones and tablets. Extends the reach of any 3.5mm headset, ideal to be used with battery charge cases / power case / juice packs, especially most MFi-certified battery cases. Provides maximum conductivity and prevents corrosion with gold-plated connectors and contacts; allows consistent signal between components using high-quality copper Specially engineered for easy grip when used as extension cable for battery charger cases or juice packs No worry-free Warranty: Buy with confidence with our 45-day money back and 18-month warranty.