This Fitbit One Fb103 Activity Tracker is the perfect device for fitness enthusiasts. It is a wireless and untested activity tracker that is sold as is. The device comes in black color and is made of plastic material.

It is suitable for both unisex adults and has features that make it perfect for various sports and activities such as gym and training, yoga, swimming, fitness, and running and jogging. The Fitbit One is a great way to keep track of your fitness goals, and it is compatible with English language.