I received this wristwatch about two years ago through a promotional campaign for a challenge. Since I have other watches, I haven't used this one much. The battery hasn't been replaced. I didn't purchase it, so I don't know the details. Digital display chronograph wristwatch. - Model Name: CHALLENGE - Functions: Date, Alarm, Chronograph - Band Material: Silicone - Backlight: Yes - Color: Black Thank you for looking.