It would be great if we can set EMO under mute/vibration mode like our smartphone. In case, we set the alarm or timer at our workplace and don’t want to disturb others when the alarm goes off.
The challenge here I think is that you most likely want this to work while he is on the charger, and he’s programmed not to move when he’s on the charger at this time.
If it can’t be made to vibrate on the charger, then maybe it can flash the screen/eyes to get attention as an alarm time trigger. Just a thought