Red, Light. The patented Gripmaster MEDICAL develops isolated finger strength, flexibility and coordination as it builds hand and forearm strength. Use each button independently to exercise fingers or compress the entire unit for complete hand and forearm strengthening. Stronger fingers cannot compensate for weaker ones. The flexible latex-free ergonomic base conforms to the patient"s palm, cushions impact and significantly increases attainable range of motion. Progressive color-coded resistance gives patient positive feedback. Comes with exercise program.