4K AI Vision · on-device processing · no facial recognition · CE-compliant (EU)
Four building blocks that mesh together
Most ball machines are essentially a slingshot with a timer. Tenniix is something else: a vision-based robot that captures the scene on court, understands in real time where the player and ball are, and decides from that where the next ball goes.
That sounds like a lot – so let's show how it works technically. The eye (AI Vision), the tape measure (UWB tracking), the muscle (QDD drive) and the brain (drill engine) mesh together. And because a camera raises legitimate questions, we then explain exactly what the device sees – and what it never lets out.
The eye
AI Vision captures player, ball and landing spot – in 4K, on-device.
The tape measure
UWB measures the player's position to the centimeter, regardless of light.
The muscle
QDD drive fires with precise spin and pace – compact and quiet.
The brain
The drill engine decides where the next ball belongs.
1 · AI Vision
A 4K dual camera that computes right where it stands
Inside the 4K AI Vision module (standard on Tenniix Pro, retrofittable on Basic) sits a dual camera that captures the court in 4K. Two lenses provide a spatial view – the device recognizes not just that something is moving, but where in space it is: player position, ball flight, landing spot.
What matters is where the computing happens: directly on the device (on-device). Image processing runs on a built-in compute module, not in a cloud. That brings two things: speed – the “next ball goes here” decision has to land in milliseconds, so no image can be shipped halfway around the world first. And privacy – what the camera sees stays physically inside the device.
Recognizes player position and movement in real time
Tracks ball flight and pinpoints the landing spot
Powers Smart Training & Smart Match Mode (opponent simulation)
Feeds the landing-spot analysis in the app (heatmaps, statistics)
2 · UWB hybrid tracking
Centimeter-accurate, even where the camera hits its limits
Camera-only recognition has physical limits – backlight, fast motion, occlusion. So Tenniix Pro combines vision with UWB (Ultra-Wideband), a radio technology for extremely precise distance measurement, the same kind used in modern smartphones for positioning.
Together with the voice wristband on your wrist, the system measures the player's position via radio – accurate to the centimeter, independent of lighting. Camera and UWB complement each other: vision provides the scene, UWB provides the hard distance. This hybrid tracking is why the balls go where training actually works.
Robot with cameraPlayer with voice wristband
AI Vision (scene)
UWB radio (distance)
Hybrid: precise landing spot
3 · QDD drive
Two wheels, full control over spin and pace
For a ball to fly with real topspin and slice, you need two independently driven launch wheels (dual-wheel) – and motors that regulate speed and torque finely and fast. Tenniix uses QDD (Quasi-Direct-Drive) motors: a design that combines high torque with precise, responsive control while staying compact and quiet.
Ball speed
up to 120 km/h
Spin (topspin & slice)
1,500–10,000 RPM
Feed interval
2–8 s
Elevation angle
14–48°
Horizontal angle
±20°
Preset shot types
9 (baseline, moonball and more)
And all of it in a body of 392 × 232 × 416 mm at about 8.5 kg – roughly half the weight of classic machines. The compact QDD drive is a key reason Tenniix can be powerful and portable at the same time.
4 · Drill engine
1,000+ pro drills that fit you
Hitting random balls doesn't make a better player. Structured, progressive training does. The Tenniix drill engine holds over 1,000 pro drills that adapt dynamically to your level – from controlled baseline rhythm to unpredictable match scenarios.
With the AI Vision module it becomes more than a playlist: in Smart Training the device responds to your position; in Smart Match Mode it simulates an opponent that learns and adjusts its strategy in real time. You control all of it hands-free via the voice wristband and (on Pro) via gesture control, with real-time LED feedback. No fumbling with a phone between shots.
Privacy architecture
A camera on the court? Fair question. Here's the honest answer.
Tenniix is built on Privacy by Design (Art. 25 GDPR). The core: image processing runs on the device itself.
A device with a camera has to be able to explain what happens to the images. Camera images are evaluated locally to compute position and ball flight, and are not uploaded as video to a cloud. Only the derived training data flow into the app – landing spots, statistics, progress. Numbers, not a video stream of you.
Processing on-device
Stays in the device
The camera image (4K)
Pose and ball detection
Real-time computation of the shot decision
on-device boundary
Leaves the device
Only if you choose – and exclusively as numbers, never as video.
Landing spots & hit statistics
Training progress
Heatmaps in your app
What Tenniix deliberately does not do
No facial recognition – the system recognizes a position, not an identity.
No biometrics – no biometric features (Art. 9 GDPR) captured or stored.
No emotion recognition – keeping the device at minimal risk under the EU AI Act.
No cloud videos – footage does not leave the device as a recording.
For club use: where Tenniix runs in public on club courts and third parties may enter the frame, we provide a signage kit (“AI training device with camera in operation”) and note it in the booking confirmation – so transparency is preserved.
Full details and the complete classification are in our privacy policy.
Built by Enhance Robotics
Tenniix is developed by Enhance Robotics – a team that brings together robotics, computer vision and sport. The idea behind it is simple and hard at once: build a training partner that combines the intelligence of a coach with the availability of a machine, in a body you carry with one hand.
The hard decisions live exactly in those tensions: powerful and light (QDD drive instead of heavy standard motors), intelligent and private (on-device instead of cloud), precise and robust for daily court use. The device is brought into the EU CE-compliant, ships with a German manual and 24 months of warranty.
Tech is one thing. Feeling it is another.
You've read how Tenniix sees, measures, computes and decides. It's most convincing on court: take a closer look at Tenniix Pro or compare the models.
