Fitness buffs, beginning bodybuilders, and resistance trainers will love the all-new improved Circuband iQ. The resistance band has just been revved up, integrating a variety of unique sensors that have been fully researched by NASA. The band gives you the capability to monitor your muscle performance even without having to go to the gym. The sensors provide accurate measurements of the degree of stretch of the muscles and create a database that allows it to develop a resistance program especially for you. The Circuband iQ is your handy trainer, your versatile workout program, and your portable home gym in one.