DT-70S The iRelax is a personal stress manager that uses biofeedback to aid the user in relaxing and managing stress. It guides user"s respiratory pace with gradual, slow, steady, and deep respiration. Features: -Personal stress management device. -US Patent Pending. -FDA Registered. -Small, lightweight, and easy to operate and carry. -Dynamic evaluation of relaxation status during the training. -Real-time display of heart rate variability curve. -Automatic assessment after training. -Clear color OLED graphic display. -Auto power on and off. -Guides respiration with intuitive graph and selectable training levels. -Dimensions: 2.5" H x 1.25" W x 1.25" D.