ienza&reg; 3.5mm Male to 3.5mm Female Auxiliary 4-Conductor TRRS Stereo Audio Extension Cable / Jack Extender / Headphone Adapter with Ultra-Slim Housing Compatible with electronic devices with 3.5mm headset audio jack, 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 / power 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 ienza is a registered trademark. Use of the ienza trademark without the prior written consent of ienza, LLC. may constitute trademark infringement and unfair competition in violation of federal and state laws.