•  What kind of glass is used for your bathroom scales? What is the thickness of it? 

It’s made of tempered glass to ensure safety use and the thickness is either 6mm or 8mm for client's option. 
 
•  How many times the CR2032 battery can be used? And how about AAA battery?
It is around 15,000 times for CR2032 and around 4,000~5,000 times for AAA battery.
 
•  How to turn on the scale?
There are 2 ways to turn on: one is to tap on the glass gently, the other is to step onto the scale directly.  It differs from specific models. 
 
•  What is the capacity of bathroom scales?
We can do 150kg (330lb) or 180kg (400lb). It differs from specific models.