The sleeping data is automatically synchronized to the Smart Wristband App on your phone when it is connected to Bluetooth. You can check the progress there.
Separate the straps and you can find the charging side with two metal connectors on the opposite side of touching key, plug it into a USB port upside down to charge.
Go to App Smart Wristband2, then Settings and disable Anti-lost
You can view part of the message when you just receive a text, just touch the screen to read the entire text.
Just receive and view, can't reply.
You might not activate Notifications for them yet. Go to Phone Setting - Notification and Allow Notification for Messages and Facebook.
It fits most sizes, but at most 9.8 inches.