3.5mm audio extension cable to connect mobile credit card readers to 99% of all cell phone cases and all 3.5mm audio readers.  Otterbox compatible 3.5mm audio extension cable is designed for mobile credit card processing without removing your Otterbox or any case. Never remove your case again with this 3.5mm audio cable by CellPay.  This cable is 6" long.  Works with any cell phone (Samsung Galaxy, Motorola, iPhone 5, 4(S), 3G(S), or tablet (iPad, Samsung Galaxy Tab, etc) that has a 3.5mm audio jack and that is currently compatible with a 3.5 mm mobile credit card reader.  Compatible with any 3.5mm audio jack mobile credit card reader by: RoamData (Roampay, Payment Jack, Pay Anywhere, PhoneSwipe, Sage), IDTech (UniMag, Shuttle), PayPal Here, Square, Verifone Audio Secure and more.  Never again fumble to accept a credit card with a case.  Extend your 3.5mm audio port from any cell phone / mobile device tablet to your new mobile credit card reader while using your protective case.  CellPay Accessories audio cable is perfect for mobile credit card processing with the Otterbox Defenders series, Trident, Spec or any protective mobile device case that isn't working with your mobile credit card reader.   CellPay Accessories has manufactured the only 3.5mm audio cable that works with 3.5mm mobile credit card readers on the market today.Troubleshooting Guide FAQ!Paypal reader / software issue - to work you must plug reader into cable 1st THEN cable into mobile phone / tablet or it will not work. Intuit GoPayment -1st time using cable you must go into settings in upper right and re-select your intuit reader.  Even though your reader is highlighted you must do this the first time for this to work.30 Day Return Policy : No Refunds. Only Exchanges/Replacements.