A:AnswerThey have a nightlight. The watch has an SOS feature. I do not know if you can dial 911 from the watch. You may need the model that allows it to serve as a phone.
A:AnswerWhen fully charged it lasts about 1.5 days to maybe 2 days. I shut mine off during night and then turn it back on in the morning and by doing that - I can get about 3 days of the one charge! But it all depends on how much you use it as well.
A:AnswerThe Apple Watch Series 3 only pairs with an iPhone 6 or above. You would need to either downgrade to the Series 2 or upgrade your phone to the 6.
A:AnswerYou get free music with the Apple Watch for 3 months trial if you never had Apple Music before. Then after you have to pay every month $9.99 or if you do a family plan with up to 5 users than it’s a flat $15 a month for Apple Music.
A:AnswerNo you do not need to buy one with cellular, it connects to your phone through Bluetooth and you can control your music from your watch. It would be perfect for you.