Description
F1/F2 controls and documented data-playback functions
The V521 supplied specification lists a 2.8-inch color display and 11 languages. Its materials describe live data, data playback, performance testing and cloud printing, and the product image shows F1/F2 buttons.
Documented functions
- Engine fault diagnostics
- Freeze-frame data
- I/M readiness status
- Vehicle information
- Live data stream
- Oxygen sensor testing
- Mode 6 monitoring
- Mode 8 testing
- Trouble-code lookup
- Cloud report printing
- Data playback
- Performance testing
- Read diagnostic trouble codes
- Battery voltage reading
Technical specifications
| Display | 2.8-inch color |
|---|---|
| Weight | 309 g (device) |
| Operating voltage | DC 9–16 V |
| Dimensions | 173 × 91.7 × 25 mm |
| Languages | 11 |
| Trouble-code library | 40,000+ |
What to verify before choosing
Performance-test labels are not independent measurements of accuracy or speed. The image advertises more than 40,000 code queries and lookup for 55 brands; that does not establish all-system diagnostics for those brands.
Designed for supported OBD-II / EOBD vehicles. Available data and functions depend on the vehicle, model year and diagnostic protocol. Engine OBD support does not imply ABS, SRS, transmission or service-function coverage.
Compare your options
Compare the V520 if its dedicated DTC, I/M and BAT controls better match your workflow. View V520.
Compare scanner budgets · Check vehicle compatibility · V520 vs V521 comparison
Sources and review scope
Reviewed 13 October 2026 against the supplied model images, specifications and updated supplier product information. Product images are shown in the gallery. These are documented claims, not hands-on test results. Hardware, included accessories and software versions must match the final order.
