CablesOnline 5pk, IP-AD07-5 3.5 mm Stereo TRRS M to F iPhone/Tablet to Card Swipe/Reader Adapter - 5 Piece (1) 3.5 mm TRRS male stereo plug to (1) 3.5 mm TRRS female stereo jack Easily connects your phone or tablet to a mobile credit card reader (PayPal swiper, square, etc.) passes left and right audio output and mic input Gold-plated molded connectors ensure a solid high quality connection between the connected devices Light weight and small design makes for convenient and easy use