| key specs |
| Compatible OS | Android, iOS | iOS, Android |
| Dial Shape | Round | Round |
| Display Type | AMOLED | AMOLED |
| Strap Colour | - | Black |
| Display Size | - | 30mm |
| Strap Material | - | Silicone |
| Ideal For | - | Unisex |
| general |
| Brand | Amazfit | Puma |
| Model | GTR 2e | Smartwatch |
| Release date | December 15, 2020 | - |
| Model Name | GTR 2e | PT9100 |
| Dial Shape | Round | Round |
| Size | Regular | Regular |
| Touchscreen | Yes | Yes |
| Water Resistance Depth | 50 metres | 50m |
| Dial Material | Aluminium Alloy | Aluminium |
| Dial Colour | Dolphin Grey, Ice Lake Green, Obsidian Black options | Black |
| Model Number | - | PT9100 |
| Strap Material | - | Silicone |
| Water Resistant | - | Yes |
| Usage | - | Fitness & Outdoor |
| Ideal For | - | Unisex |
| Strap Colour | - | Black |
| dimensions |
| Width | 46.5 | - |
| Height | 46.5 | - |
| Thickness | 10.8 | - |
| Weight (g) | 32.00 | 95.00 |
| product details |
| Sensor | Huami self-developed BioTracker PPG (support blood oxygen), acceleration sensor, gyroscope, 3-axis geomagnetic sensor, ambient light sensor, air pressure sensor, temperature sensor | Accelerometer, Altimeter, Ambient Light, Gyroscope, Heart Rate Sensor, Microphone, NFC, Untethered GPS |
| Compatible Device | Android, iOS | Android, iOS smartphones |
| Notification | Yes | Yes |
| Battery Life | 24 | 1-2 days |
| Charge Time | 2.5 hours | 2hrs |
| Charger Type | Magnetic | Wireless |
| Rechargeable Battery | Yes | Yes |
| Closure | - | Strap Buckle |
| Notification Type | - | Vibration |
| Battery Type | - | Lithium Ion |
| connectivity features |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 4.2 |
| Other Connectivity Features | NFC | - |
| GPS | - | Yes |
| platform and storage features |
| Compatible Operating System | Android, iOS | iOS, Android |
| Operating System | - | Wear OS |
| RAM | - | 512MB |
| Processor Name | - | Snapdragon Wear 3100 |
| Internal Memory | - | 4GB |
| camera and display features |
| Display Resolution | 454x454 | 390x390 pixels |
| Display Type | AMOLED | AMOLED |
| Display Size | - | 30mm |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Compass | Yes | - |
| Calendar | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Number of Buttons | 2 | 1 |
| Other Fitness Features | BioTracker 2 PPG, bioogical data sensor | Activity Tracker (Distance, Steps, Calories Burned, Heart Rate) |
| Language | - | English |
| Other Watch Functions | - | Smart Notifications (Text, Email, Social Media App Alerts), Alarm Clock, Calendar Alerts) |
| audio and video features |
| Speaker | Yes | - |
| Microphone | Yes | Yes |
| Voice Control | - | Yes |