Perfect Fitness IQ Band Wristband that tracks activity, steps, total calories burned and sleep Wristband with 3D accelerometer tracks activity and wirelessly syncs with your smartphone using Bluetooth Smart technology Helps you accelerate your daily activity by tracking your habits Allows you to set goals and track progress on your own personal dashboard using the free Perfect app available for iOS and Andriod Battery life of 4-7 days (depending on usage)