It frequently uses, or is compatible with, physical controls, making it easy to skip tracks or adjust volume without looking at the screen. Sone523mp4 vs. Smartphones Sone523mp4 Portable Modern Smartphone Distractions None (No notifications) High (Notifications/Apps) Battery Life Excellent (Dedicated) Moderate/Poor (Multitasking) Storage microSD Expansive (up to 1TB) Fixed/Cloud Dependent Weight Very Lightweight Cost Budget-friendly (