Discover the key differences between the Romeo Pro, Romeo 2, and Romeo Ultra models for the ideal ride.
Universal Core Features
| Feature | Operation Method | Key Insight |
| Power On/Off | Long-press the ON/OFF button (>2 sec) | Auto-shutdown after 5 min inactivity |
| Data Cycling | Short press 'i: Cycles ODO → MAX → AVG → Ride Time | Tracks distance/speed stats |
| Settings Save | Short press 'ON/OFF' to confirm selections | Critical for configuration changes |
| PAS Adjustment | +/- buttons: 0 (no assist) to 5 (max power) | 0 gear = zero motor output |
| Walk/Boost Mode |
Pro/Ⅱ: (In 0 gear) short press '-' to display 🚶 icon > long press '-' to enter the boost mode Pro Ⅱ 2025/Ultra/Ultra Ⅱ: Long press '-' to enter the push-assistance |
Maintains 6km/h without pedaling |
| Headlight Control |
Pro/Ⅱ: Long press '+' Pro Ⅱ 2025/Ultra/Ultra Ⅱ: Long-press the 'light' button |
Auto-dims display when activated |
| Unit Conversion |
Setting > Unit > +/- to select > Save |
Standard across all models |
| Trip Reset |
Setting > +/- to Trip Reset > +/- to select YES/NO > Save |
Clears TRIP/AVG/MAX data |
| Backlight Brightness |
Setting > +/- to select Brightness > 'ON/OFF' to enter > Save |
5-level brightness adjustment |
| Language Selection |
Settings > Select Language > Confirm |
Pro/Ⅱ/Pro Ⅱ 2025: 3 languages Ultra/Ultra Ⅱ: Extended options |
| Bluetooth Setup | Settings > Password > Bluetooth > +/- to select ON/OFF > Save | |
| Bluetooth connection | Settings > Bluetooth > Scan QR code in app > Bluetooth function logo lights up | Pair via "Key-Disp" QR scanner |
Model-Specific Operations
1. UI Customization
| Model | Operation | Options |
| Romeo Pro |
'ON/OFF' to enter Settings > +/- to select Themes > 'ON/OFF' to save |
4 theme styles |
| Romeo Ⅱ | Settings > Themes > +/- to cycle > 'ON/OFF' to confirm | 4 theme styles |
| Romeo Pro Ⅱ 2025 | Settings > Themes > +/- adjust > Short 'i' save | 4 theme modes |
| Romeo Ultra | Not supported | - |
| Romeo Ultra Ⅱ | Settings > Display > Theme Pack > Install via Bluetooth | Downloadable themes (3 max) |
2. Drive Mode Switching
| Model | Operation | Mode Sequence |
| Romeo Ⅱ | Short-press the 'ON/OFF' button | Rear / Front / Dual |
| Romeo Ultra Ⅱ | Hold 'i' > 2 sec > +/- select > Short 'i' save | Front/Rear/Dual |
| Romeo Pro/Pro Ⅱ 2025 | N/A | - |
3. Cruise Control
| Model | Operation | Activation Condition |
| Romeo Ⅱ | Long-press "-" while riding | Speed >15km/h required |
| Romeo Ultra/Ultra Ⅱ | Set throttle-6km=ON > Hold "-" >2 sec (K6 model) | Enable in advanced settings |
| Romeo Pro/Pro Ⅱ 2025 | N/A | - |
4. Automatic power off
| Model | Operation Method | Adjustable Range | Default Setting |
| Romeo Pro | No custom setting > Auto-shutdown after 5 minutes of inactivity | N/A | 5 minutes |
| Romeo Pro Ⅱ 2025 / Ultra / Ultra Ⅱ | Settings > Dormancy > Select 0–10 min > 'i' to save | 0–10 minutes | 5 minutes |
| Romeo Ⅱ | Settings > Auto Off > Select 0–60 min > 'ON/OFF' to save | 0–60 minutes | 5 minutes |
Advanced Configuration
1. Password Setup
| Model | Default | Change Method |
| Romeo Pro | 0000 | Settings > Password option > Start Password > Switch digit code |
| Romeo Ⅱ | 0000 | Simultaneous press +/- >3 sec > Password > Start Password |
| Romeo Pro Ⅱ 2025 | 0000 | Settings > Password > Start Password > Enter Code |
| Romeo Ultra/Ultra Ⅱ | 1212 | Settings > Password > Start Password > Enter Code |
2. Modify the password
| Model | Password Modification |
| Romeo Pro / Ⅱ / Pro Ⅱ 2025 / Ultra / Ultra Ⅱ | Settings > Password > Enter Old Password > Reset |
3. Diagnostic Tools
| Feature | Error Codes | Motor Temp | Battery Analytics |
| Romeo Pro | Settings > Error Code | N/A | Basic % display |
| Romeo Ⅱ | Settings > Information > Error Code | N/A | Voltage level setting |
| Romeo Pro Ⅱ 2025 | Settings > Error Code | N/A | Basic % display |
| Romeo Ultra/Ultra Ⅱ | Auto-display on fault | Settings > Front/Rear Temp | 5-page Battery A/B Info |
Why This Matters for Riders
Understanding these features empowers riders to tailor their e-bike experience to specific needs. For instance, the PAS (Pedal Assist System) adjustment (0–5 levels) balances battery life and motor power, ideal for long commutes or hilly terrain. Cruise control in Romeo 2 and Ultra models reduces fatigue during extended rides by maintaining a steady speed, while Bluetooth connectivity enables real-time navigation and data tracking via the "Key-Disp" app. Model-specific UI themes and drive mode switching (e.g., dual/front/rear drive) add layers of personalization, ensuring the bike adapts to riding style and environment. Diagnostic tools like error code display and battery analytics enhance safety by preempting issues, making these features essential for a reliable ride.
Only the most common functions are listed for reference. For more updated features, please refer to the user manuals of each model.
Please leave a message in the Facebook group or contact customer service(service@eahoraebike.com) as soon as possible with any questions you might have.
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