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Microprocessor Knees

In 1997, the C-Leg® was introduced to the world as a powerful alternative choice to mechanical knees. With more than 100,000 fittings and more than 25 years of practical experience and research, Ottobock has created a family of unmatched microprocessor knees developed to meet the specific needs of people with different lifestyles.

With the family of Ottobock knees, you are able to make informed clinical decisions and deliver a knee chosen specifically for the individual’s level of function, ability, and activities.

Contact your Ottobock Sales Representative to arrange a free patient trial today!

Ottobock Microprocessor Knee



C-Leg 4



K-Level K2, low-K3*** K3, K4 K3, K4 K3, K4
IP Rating IP 22 IP 67 IP 67 IP 68
Stance control Locked or intuitive stance Intuitive or manual stance Intuitive or deliberate stance Intuitive or deliberate stance
Real-time swing control
Stumble recovery
Clinically-proven OPG 2.0      √  √
Running capacity     Walk to run Running mode
Battery life Approx. 1 day* Approx. 2 days* Approx. 5 days* Approx. 5 days*
Corrosion resistant      
Moisture protection Protected against dripping water with IP 22 Water-resistant with IP 67 Water-resistant with IP 67 Waterproof and fully functional under water with IP 68 + water jets
Maximum knee flexion angle 124° 130° 135° 135°
Weight limit 330 lbs
(150 kg)
300 lbs
(136 kg)
330 lbs
(150 kg)
330 lbs
(150 kg)
User app available  
Service requirement 36th month, condition-based** 36th month, condition-based** 24th month 12th and 24th month
Training requirement Online training course or optional one-day classroom training or Cooperative Care appointment for hands-on learning
*Daily charging recommended
**Service may occur sooner if the knee reaches specific condition-based thresholds.
***More specifically, for patients who walk with speeds of up to 1.9 mph and up to ½ mile outside the house per day.
Knees - Microprocessor  - Sub Categories
11 Products found

Item #: 3C88-3=9.2-3

C-Leg 4, Threaded top, desert pearl

Item #: 3C88-3=8.5-3

C-Leg 4, Threaded top, midnight shadow

Item #: 3C98-3=9.2-3

C-Leg 4, Pyramid top, desert pearl

Item #: 3C98-3=8.5-3

C-Leg 4, Pyramid top, midnight shadow

Item #: 3B5-3=ST
Threaded top

Item #: 3B1-3
Pyramid top, Volcano Shadow

Item #: 3B1-3=ST
Threaded top, Volcano Shadow