| key specs |
| Strap Colour | Black, Blue, Gold, Red, Silver | - |
| Strap Material | Silicone | Silicone |
| Dial Shape | Square | Rectangle |
| Ideal For | Unisex | Unisex |
| Compatible OS | - | Android 5.0/ iOS 10.0 and above |
| general |
| Brand | Fire-Boltt | Amazfit |
| Model | Ninja Call 2 | Bip S |
| Release date | March 1, 2022 | January 8, 2020 |
| Model Name | Fire-Boltt Ninja Call 2 | Bip S |
| Dial Colour | Black | Black |
| Dial Shape | Square | Rectangle |
| Strap Colour | Black, Blue, Gold, Red, Silver | - |
| Strap Material | Silicone | Silicone |
| Size | Regular | Regular |
| Touchscreen | Yes | Yes |
| Water Resistant | Yes | Yes |
| Usage | Fitness & Outdoor | - |
| Ideal For | Unisex | Unisex |
| Interchangeable Strap | - | Yes |
| Water Resistance Depth | - | 5 ATM |
| product details |
| Sensor | SpO2 Monitoring, Heart Rate Monitor, Optical Heart Rate Sensor | BioTracker PPG bio-tracking optical heart rate sensor, 3-axis acceleration sensor, 3-axis geomagnetic sensor |
| Compatible Device | Android, iOS | Android, iPhone |
| Notification | Call, Text, Social Media | Yes |
| Battery Life | 10 Days | 40 days |
| Rechargeable Battery | Yes | Yes |
| Battery Type | - | lithium-ion polymer |
| Charge Time | - | 2.5 hours |
| Charger Type | - | 2 pogo pin USB Magnetic charger |
| Stand By Time | - | 90 days |
| connectivity features |
| Call Function | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5 | 5.0 |
| Call Features | calling | - |
| Other Connectivity Features | Smart notifications | - |
| GPS | - | Yes |
| camera and display features |
| Display Resolution | 240x288 | 176x176 |
| Other Display Features | Touch Screen | - |
| Scratch Resistant | - | Yes |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Language | English | - |
| Number of Buttons | 1 | - |
| Other Fitness Features | Meditative breathing, sleep tracking, drink water reminders | - |
| Other Watch Functions | Stopwatch, sedentary reminders | - |
| Compass | - | Yes |
| audio and video features |
| Other Multimedia Features | Music control | - |
| dimensions |
| Width | - | 35.3 |
| Height | - | 42 |
| Thickness | - | 11.4 |
| Weight (g) | - | 19.00 |
| platform and storage features |
| Operating System | - | Amazfit OS |
| Compatible Operating System | - | Android 5.0/ iOS 10.0 and above |