| key specs |
| Dial Shape | Rectangle | Round |
| Ideal For | Unisex | - |
| Compatible OS | - | Android, iOS |
| Display Type | - | AMOLED |
| general |
| Brand | Fire-Boltt | Amazfit |
| Model | Ninja Call Pro Plus | GTR 2e |
| Release date | November 22, 2022 | December 15, 2020 |
| Dial Shape | Rectangle | Round |
| Touchscreen | Yes | Yes |
| Water Resistant | IP67 | - |
| Ideal For | Unisex | - |
| Model Name | - | GTR 2e |
| Size | - | Regular |
| Water Resistance Depth | - | 50 metres |
| Dial Material | - | Aluminium Alloy |
| Dial Colour | - | Dolphin Grey, Ice Lake Green, Obsidian Black options |
| product details |
| Notification | Smart | Yes |
| Battery Life | 6 days | 24 |
| Stand By Time | 15 days | - |
| Sensor | - | Huami self-developed BioTracker PPG (support blood oxygen), acceleration sensor, gyroscope, 3-axis geomagnetic sensor, ambient light sensor, air pressure sensor, temperature sensor |
| Compatible Device | - | Android, iOS |
| Charge Time | - | 2.5 hours |
| Charger Type | - | Magnetic |
| Rechargeable Battery | - | Yes |
| connectivity features |
| Call Function | Yes | - |
| Bluetooth | - | Yes |
| Bluetooth Version | - | 5.0 |
| Other Connectivity Features | - | NFC |
| fitness and watch functions |
| Heart Rate Monitor | Yes | Yes |
| Other Fitness Features | Drink water reminder, female health care, heart rate tracker, sedentary tracker, sleep monitoring, and SpO2 | BioTracker 2 PPG, bioogical data sensor |
| Other Watch Functions | Camera control, music control, weather updates | - |
| Step Count | - | Yes |
| Calorie Count | - | Yes |
| Compass | - | Yes |
| Calendar | - | Yes |
| Alarm Clock | - | Yes |
| Date & Time Display | - | Yes |
| Number of Buttons | - | 2 |
| dimensions |
| Width | - | 46.5 |
| Height | - | 46.5 |
| Thickness | - | 10.8 |
| Weight (g) | - | 32.00 |
| platform and storage features |
| Compatible Operating System | - | Android, iOS |
| camera and display features |
| Display Resolution | - | 454x454 |
| Display Type | - | AMOLED |
| audio and video features |
| Speaker | - | Yes |
| Microphone | - | Yes |