Get a better workout with this Activ5 fitness tracker. The sturdy but compact design offers easy portability and lasting durability, and integrated sensors track workouts and measure more than 200 pounds of muscle force. This Activ5 fitness tracker includes a convenient app that coaches you through over 100 workouts and games that make exercising fun. Activity & Health Tracker Buying Guide Features Personalized exercise Activ5 calibrates to everyone's unique strength level and dynamically creates over 100 workouts based on your unique fitness fingerprint. Everyone can have their own Activ5 account, and an entire household can share a single Activ5 device. Five-minute workouts Activ5 isometric-based exercises are highly efficient because they work out multiple muscle groups at one time, and they maintain a muscle contraction for an extended period of time. Gamified exercise You can download free Activ5 casual games and use Activ5 as a game controller, so you can get exercise while playing fun mobile games. Durable design Measures more than 200 lbs. of force. Works with iOS and Android devices via Bluetooth Coaching and tracking Through the free Activ5 coaching application, Activ5 actively coaches you through every exercise. Activ5 also presents your exercise and total workout results for the day and over time. Exercise anywhere Portable for easy access Battery-powered device One AAA battery provides up to six month of battery life.