Vastar 3.5mm Headset Audio Jack Extender; Headphone Adapter for Battery Charger Case, Power Case, Juice Pack for iPhone and Android Smartphones and Tablets; 4-Pole 3.5mm Male to 3.5mm Female Extension Cable [Gold Plated Connectors / No Sound Distortion / Works with Volume Controls and Credit Card Readers Made for devices with 3.5mm (1/8 inch) headset audio input, including iPhone or Android smartphones and tablets; works with headsets with/without volume controls, and also with Square Readers, PayPal and other credit card readers 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 made by MobilePal, Anker, Mophie, etc. 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 Worry-free Warranty: Buy with confidence with our 45-day money back and 18-month warranty.