Sometimes we want a device that can control a lot of things in our homes without having to login to a web browser, you want something on the Go, but market products that target this purpose are either expensive or not really reliable because their softwares are proprietary and you can't really modify them to what you want. Yes, you and I also want to listen to audiobooks while doing other things or even listen to music on Spotify using a mobile device that fits in our hands, our mobile phones sometimes are the only tools available for that purpose, but these smart phones are sometimes a distraction because, just when you are about to skip a song while listening to Spotify then a message or post notification from X pops up that toys your attention and you are curious what it is, you will open it, neglecting other things you are doing and focus on the smart-phone. Look at Melodio Self-Mate. All files and other necessary details on PCBWAY project link.