The digital audio signal enters through the Lightning connector end that can be connected to the Apple iPhone/iPod/iPad (and other Apple products), while the analog audio signals are pushed out through the 3.5mm output. The i1 also automatically detects if you are using a standard headphone or one with in-line controls. Built into the i1 is a high-sensitivity microphone that ensures your voice is clearly heard during calls and recordings – no more miserable conversations due to poor voice quality. The three-button design of the i1 allows you to effortlessly pause, play, and switch tracks, as well as answer the phone, adjust the volume, and a number of other operations.