Periodic Audio was founded in 2016 and focuses strictly on audio products that fit in your pocket. Not a separate case, or that need to be tucked in your bag. Small enough to fit in your pocket. If you have to stop and think about bringing it with you—it's not portable. Phone, wallet, keys, in-ear monitors (IEMs). Periodic Audio products are the founder's interpretation of what is required to take your music with you when you are out of your house, and out of your vehicle. Inconspicuous, convenient, and high quality. Portable Audio Excellence.