This came in a Fitbit that I bought for resale but it did not work. So I'm sending the charging port by itself. Look at the picture because that is the item you're getting

The OEM USB Charger Charging Cable Dock is designed specifically for Fitbit Charge 3 and Charge 4 models. This 3ft black cable is made of durable plastic and is ideal for charging your Fitbit during gym training or jogging. Manufactured in the United States, this charging cable ensures a reliable connection for your Fitbit, allowing you to focus on your fitness goals without worrying about running out of battery.