
Leading Technology
The COVVI team are highly experienced in the prosthetics field and have collaborated throughout development, to put into practice the lessons learned from preceding designs. The Nexus Hand is enabled by an innovative actuator design with market-leading power density and comes in three different sizes, all of which operate with next level grip force (70N) and speed (0.4s Tripod grip) capabilities.
It also has a three-way digit control system, in addition to a built-in E-Paper screen that can display notifications, troubleshooting issues and training information during set-up.
Nexus Hand – Small Size | 17.15 cm / 6¾ inches |
Nexus Hand – Medium Size | 18.42 cm / 7¼ inches |
Nexus Hand – Large Size | 19.69 cm / 7¾ inches |
Nexus Hand Voltage | 7 to 8.4V |
Maximum Current Consumption | 5A |
Device Weight | 570 g / 1¼ lbs. |
Maximum Hand Load Limit (A) | 90 kg / 198 lbs. over the knuckles |
Maximum Finger Load Limit | 16 kg / 35 lbs. |
Full Open to Full Close | 0.7 seconds to achieve grip |
Tripod Grip | 0.4 seconds to achieve grip |
Tripod Grip Force | 45N / 10 lbf |
Power Grip Force | 80N / 18 lbf |
Key Grip Force | 22N / 5 lbf |
Engineering Behind Nexus
Our hand size range is suitable for all adults and most adolescents. At COVVI, we started with the small Nexus Hand and built bigger. This ensured we did not compromise on any functionality across the size range where in the past engineers had always started big and tried to shrink their design down, which was challenging to do without losing some of the hand’s function.
We are extremely proud of our compact design and cannot wait to see you bring it to life!
Please Note: This infographic below should only be used as a guide. Please take measurements of hands from clinical data. TASKA is owned by 5TH ELEMENT LIMITED, Bebionic is owned by Otto Bock HealthCare GmbH, i-Limb is owned by Touch Bionics Limited

Electrodes
The COVVI electrodes are compatible with most standard electrode cabling and operate at a 30-250Hz frequency band (highly sensitive at low levels).
Really easy to fit, our ‘T-shape’ construction drops through a hole in the socket wall and is locked in place with a spring-loaded clip. The flexible upper housing conforms well to the inside surface of socket walls.
Our electrodes also use bio-compatible titanium contacts, ensuring a comfortable, skin-friendly and flexible upper surface, in addition to a notch filter to reduce interference.
Power Supply
Our product features an extremely light and highly flexible battery solution that will follow the contours of the limb without bending the cell. It has a USB-C charge point, which is great for charging on the go, and is compatible with all 7.4v EQD hand systems.
Our arm connectors are military-grade and utilize simple latching features. The power supply is compact and robust with a rubberized design that communicates with the built-in E-Paper screen, displaying battery life among other information.
The power density is double that of competing systems: 7.4v 1600mAh, 2xCELLS (3.9in x 1.7in x 0.1in).
Clinician Demonstration Unit
Our clinician demonstration unit (CDU) has been developed to assist in the programming, and demonstration, of the Nexus Hand for individual users with ease. Key features of the CDU include USB-C charging, twin electrode inputs, an informative OLED screen that conveniently displays accurate battery levels and proportional control (available from push buttons in addition to the accompanying COVVI Go app.)
However, the COVVI CDU isn’t limited to excellence in design or use of premium materials to construct it but is complete through the implementation of the intuitive features; these enable communication with user devices, as well as between clinicians and a local technical support team using built-in diagnostics software.