CanDo Twist n Bend Hand Wrist Exerciser Black Respiratory Care Automatic age based target zone : MSHQ 530914G Automatic age based target zone : bpm % * To help you train safely and effectively the training computer determines your heart rate target zone limits automatically according to your age based maximum heart rate (220 minus age) * The Power Pro Elite Mattress System combines 2 clinically effective therapies: True Low Air Loss and Alternating Pressure in a portable system * Mattress utilizes 18 independent 9Ã deep air cells to reduce interface pressure for the prevention and treatment of Stages I IV pressure ulcers * Designed to fit all standard hospital beds * Supports patient weights up to 1000 Lbs * Lightweight portable exerciser designed to strengthen hand wrist and shoulder muscles * Promotes coordintaion increases range of motion and aids in neuromuscular and balance training * Exercisers maintain a consistent bar diameter of 2 and length of 12