How long should I use new led mask a day?
user
How long would you like to use your new mask a day?
assistant
30-60 minutes a day
user
Great!  I think you should use your new mask 30-60 minutes a day.
assistant
How long should I use new led mask a day?
user
How long would you like to use your new mask a day?
assistant
30-60 minutes a day
user
And are you on the process of picking out a mask, or are you already using one?
assistant
How long should I use new led mask a day?