The PROTEOR QUATTRO Microprocessor Knee  is designed to be more intuitive, more personalized, and more adaptable. With patented technology, advanced customization options, extended battery life, and simple maintenance, QUATTRO gives you more of exactly what you need to live the life you want.

More intuitive for elevated security and dependability

More intuitive for elevated security and dependability

The sophisticated technology of QUATTRO is designed to deliver safety and security. With three hyper-responsive sensors and a patented valve made to read and react to your body’s biomechanics, you can trust your knee every step of the way.

QUATTRO Control Technology’s patented valve allows infinite levels of resistance to accommodate each person’s unique movements, making transitions between activities effortless.

Three hyper-responsive sensors read body movements to react to the natural gait of each patient

Stumble recovery reacts to each situation by determining the appropriate resistance for the patient to recover more naturally.

More personalized for a custom experience

The beauty of QUATTRO is that it can be as personalized or as simple as desired. Using your phone and knee keypad, you have the option to adjust modes and settings to customize your movement. QUATTRO is designed for a variety of activities and lifestyles—including yours.

With up to 20 modes, patients can customize their movement for specific activities.

mobile app offers prosthetists the simplicity of programming and calibrating settings.

As the shortest MPK on the market, patients can choose from a wider selection of ankles and feet.

More adaptable for fewer interruptions

The features are engineered so you can do more of what you love with fewer disruptions. Four-day battery life, including a booster, and no service for three years allow you to live your life with less hassle.

With a battery life of two days, plus a booster with an additional two days of battery, patients can do more for longer.

Service is not required for three years, and remote firmware updates simplify use for the prosthetist and the patient.

Water-resistance (IP67 rating) allows patients to fully submerge under 1 meter of water for up to 30 minutes.

Remote transmission of 3-months of cadence and usage data.

PDAC Verified L-Code(s): L5856, L5828, L5848, L5845, L5850, L5925

Item N°.




3.65lbs (1655g)

Build Height

8.5″ (216mm)

Knee Flexion


Proximal Connector


Threaded Top

Maximum patient weight

300lbs /136kg

Activity level

K3 / K4

Battery Life

2-3 days

Water resistance