A:AnswerYou can use your FSA money. I had to purchase it with my own debit card and then submit a claim for reimbursement because best buy would not accept my FSA card. But your FSA will reimburse you. But just double check with your FSA company as everyone is different!
A:AnswerGen 3 & 4 ring sizes are not the same. This might be because Gen 4 is smooth on the inside. You need to order a new size kit for Gen 4, or find your size in the store.
A:AnswerIt looks like it don’t does it at night while you sleep, unless I am just not looking in the right spot on the app. But I don’t believe it does daytime