New MonBaby Smart Button - a Smart Breathing and Movement Monitor - White

Is it water proof? Like if the baby gets sick can i clean it and it still work properly?

How do you know when battery is dead? A few days ago it had half a battery after using it for about a week. Now it’s not showing up for the app.

My clip broke already . Do they have a replacement?

Does the app need to be running on the phone to get alarms?