Specifically designed for post-surgery, when serious pain relief is required! Polar Products' Active Ice 3.0 Knee & Joint Cold Therapy System is the most reliable and user-friendly therapy system on the market. The Active Ice 3.0 System's powerful, yet whisper-quiet pump delivers continuous cold therapy relief. The system comes standard with a digital timer and on/off switch. When turned on, the timer defaults to 30 minutes, but can be increased by 30-minute increments depending on your health care professional's recommendation. This is a key safety feature! The universal bladder can be used on any part of your body that needs focused cold therapy. Easy to use time and time again, simply add ice and water to the cooler. High flow, dry, quick disconnect couplings allow for flexibility to relocate if needed. Designed for use on the knee. Active Ice 3.0 Knee & Joint Cold Therapy System is designed to reduce localized pain and swelling following surgical procedures or trauma.