Use the guided tester to record observations. Browser response measurements are not hardware latency or true USB polling-rate measurements.
Open the controller tester →Input behaviour is not proof of identity
An unusual trace may justify further investigation, but it does not establish that a controller is counterfeit. Genuine products can have faults or unusual mappings. Third-party controllers may also be legitimate products sold under their own brand. Separate authenticity, compatibility and condition.
Start with the purchase evidence
Keep the receipt, listing, seller details and photographs of the packaging and labels. Compare the exact claimed model with the manufacturer’s documentation. Ask the seller to explain inconsistencies and use the manufacturer’s support channel when available.
A low price alone is not a verdict. Avoid making an accusation from one visual detail or one software result. If returning a product, describe observable discrepancies and the seller’s claims accurately.
Why polling and circularity are not lie detectors
GamepadInsider’s response view observes changes available to the browser. It does not authenticate the transport, measure true USB polling or verify the manufacturer. Earlier real-versus-fake polling thresholds in this guide were unsupported and have been removed.
Likewise, a square-shaped stick trace, a large deadzone or an unusual circularity number can have several explanations. There is no authenticity pass/fail threshold in this tool. A displayed device name is an identifier provided through software, not an independent certificate.
What a test report can usefully show
Record whether buttons register, triggers reach their reported range and sticks return to a consistent center. Include the connection and software environment. These observations can explain why a product is unsuitable or faulty without claiming to identify its origin.
Do not call a device fake because vibration is unavailable in one browser. Feature support varies across the device, browser and connection. Use independent evidence before reaching a conclusion.
The next step
If authenticity remains uncertain, pursue seller or manufacturer verification. If the problem is performance, follow the relevant troubleshooting guide and keep the identity question separate.
Sources and next steps
MDN: Gamepad API capabilities and identifiers
Try the relevant check and compare your observations with the guidance.
Stick movement · Buttons · Triggers