This is a practically brand new watch, only used a few times. Battery life is 5-7 days, has bluetooth capability and comes with two different bands. Charger and original box included. There are no errors with this watch, and it functions beautifully. In a few hours the watch reaches full charge, and has many different features. Some features include heart rate monitoring, sleep feedback, and exercise tracking. I like that it linked to my Strava, so all my workouts would auto upload. I turned that feature on, so it’s not something you have to have on if you don’t want. It works with an app called VeryFit. It’s pretty easy to use and easy to set up.