| key specs |
| Strap Colour | Black, Blue, Gold, Green, Grey, Pink, Purple | Black |
| Display Size | 43mm | 33mm |
| Strap Material | Silicone | Silicone |
| Dial Shape | Square | Rectangle |
| Ideal For | Unisex | Unisex |
| Compatible OS | - | Android, iOS |
| general |
| Brand | Fire-Boltt | Fire-Boltt |
| Model | Ninja Bell | Ninja |
| Release date | June 1, 2022 | August 4, 2021 |
| Model Number | BSW040 | BSW007 |
| Model Name | Fire-Boltt Ninja Bell | Ninja touch to Wake SpO2 |
| Dial Colour | Gold | Black |
| Dial Shape | Square | Rectangle |
| Strap Colour | Black, Blue, Gold, Green, Grey, Pink, Purple | Black |
| Strap Material | Silicone | Silicone |
| Size | Regular | Regular |
| Touchscreen | Yes | Yes |
| Water Resistant | Yes | Yes |
| Usage | Fitness & Outdoor | - |
| Ideal For | Unisex | Unisex |
| Water Resistance Depth | - | 1m |
| Dial Material | - | Metal |
| dimensions |
| Width | 44.17 | 41 |
| Height | 35.78 | 34 |
| Thickness | 11.6 | 10 |
| Diameter | 43 | 33 |
| Weight (g) | 51.00 | 80.00 |
| product details |
| Closure | Strap Buckle | - |
| Sensor | SpO2 Monitoring, Heart Rate Monitor, Optical Heart Rate Sensor | Accelerometer Sensor, Barometer Sensor, Gyro Sensor, Light Sensor, Optical Heart Rate Sensor, SpO2 Sensor, Blood Pressure Monitor |
| Compatible Device | Android, iOS | Android, iPhone |
| Notification | Call, Text, Social Media | Yes |
| Stand By Time | 25 Days | 15 days |
| Rechargeable Battery | Yes | Yes |
| Battery Type | - | Li-ion |
| Battery Life | - | 5 days |
| Charge Time | - | 120 minutes |
| connectivity features |
| Call Function | Yes | No |
| Bluetooth | Yes | Bluetooth |
| Call Features | Reject Calls, Take Calls, Speed Dial, Save Contacts, Call History, Calling Support via inbuilt Mic and Speaker | - |
| Other Connectivity Features | Smart notifications | - |
| Bluetooth Version | - | 5.0 |
| Messaging Support | - | Yes |
| Operating Range | - | 10m |
| Third Party App Support | - | Limited |
| camera and display features |
| Display Resolution | 240x280 | 240x240 |
| Display Size | 43mm | 33mm |
| Other Display Features | Touch Screen | - |
| Backlight Display | - | Yes |
| Scratch Resistant | - | Yes |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Chronograph | Yes | No |
| Date & Time Display | Yes | Yes |
| Language | English | English |
| Number of Buttons | 1 | - |
| Other Fitness Features | Sleep tracking | 7 sports modes |
| Other Watch Functions | Sedentary reminders | - |
| Calorie Count | - | Yes |
| Calendar | - | Yes |
| platform and storage features |
| Compatible Operating System | - | Android, iOS |