AYFEE MFi Certified Lightning Cable, Phone Charger Cable【5-Pack 1M 1M 2M 2M 3M】 Extra Long Nylon Braided Fast Charging& Syncing Cord Compatible with

Very easy to use, especially if you've used a BP monitor before. I was amazed at the reduction in BP after listening to the racing music. It really does work.I'd highly reccomend this device.