This is for a used in great condition fitbit sense. This fitbit sense comes with only the small band and two 3rd party charger cords. This fitbit sense features daily readiness, stress management, compatible ECG app, built-in GPS, voice assistance, and help optimize your sleep, among many other features. The battery life is 6 plus days and features fast charging. You can use Amazon alexa or Google assistant built in. When you download the app on your phone, you can access a user manual since one is not included. The fitbit sense will come factory rested.
Any more questions please ask.