You attach it around your water bottle and it monitors your fluid intake, reminding you, with sounds and LEDindicators, that, perhaps, its time to drink more water.
Up front there are minimal LEDindicators including one for power, another for network connectivity and finally Sling's upside-down "U" that lets you know when someone is using it.
The topmost section features a physical volume dial that also serves as a mute switch when pushed, surrounded by a circular cluster of LEDs (for clockwise-flowing level indication) and then a secondary outer ring of capacitive buttons and LEDindicators.