| key specs | 
| Strap Colour | Black, Silver, Gold, Active Black, Brown | Charcoal Black, Cloud Grey, Rose Pink | 
| Display Size | 36mm | 42mm | 
| Compatible OS | Android, iOS | - | 
| Strap Material | Stainless Steel | Silicone | 
| Dial Shape | Round | Round | 
| Display Type | - | AMOLED | 
| Ideal For | - | Unisex | 
| general | 
| Brand | Fire-Boltt | Noise | 
| Model | Ultimate | Fit Evolve 2 | 
| Release date | June 19, 2023 | December 10, 2021 | 
| Model Number | BSW158 | - | 
| Model Name | Ultimate | NoiseFit Evolve 2 | 
| Dial Colour | Black | Black | 
| Dial Shape | Round | Round | 
| Strap Colour | Black, Silver, Gold, Active Black, Brown | Charcoal Black, Cloud Grey, Rose Pink | 
| Strap Material | Stainless Steel | Silicone | 
| Touchscreen | Yes | - | 
| Water Resistant | IP68 | Yes | 
| Size | - | Regular | 
| Interchangeable Strap | - | No | 
| Water Resistance Depth | - | 5ATM | 
| Usage | - | Fitness & Outdoor | 
| Dial Material | - | Polycarbonate | 
| Ideal For | - | Unisex | 
| dimensions | 
| Width | 46.6mm | - | 
| Height | 50.6mm | - | 
| Thickness | 10.4mm | - | 
| Diameter | 35.3mm | - | 
| Weight (g) | 80.00 | - | 
| product details | 
| Sensor | SPO2, Heart Rate Tracking, women health tracker | Blood Oxygen Monitor, Heart Rate Monitor | 
| Compatible Device | Android, iOS | Android, iOS | 
| Notification | Yes | Call, Text, Social Media | 
| Notification Type | Calls, Sms, Whatsapp and Social Media | Vibration | 
| Battery Type | Lithium Ion | - | 
| Battery Life | 7 days | 7 | 
| Charge Time | 2 hours | 70 Minutes | 
| Stand By Time | 20 days | 42 Days | 
| Rechargeable Battery | Yes | Yes | 
| Closure | - | Strap Buckle | 
| Other Features | - | Sleep tracking, stress monitoring | 
| connectivity features | 
| Call Function | Yes | Yes | 
| Bluetooth | Bluetooth | Yes | 
| Bluetooth Version | Bluetooth 5.0 | - | 
| Wi-Fi | - | Yes | 
| Messaging Support | - | Yes | 
| Email Support | - | Yes | 
| Operating Range | - | 10m | 
| Call Features | - | Mute calls, Reject calls | 
| platform and storage features | 
| Compatible Operating System | Android, iOS | - | 
| camera and display features | 
| Display Resolution | 240 x 240 pixels | 390x360 | 
| Display Size | 36mm | 42mm | 
| Display Type | - | AMOLED | 
| Scratch Resistant | - | Yes | 
| fitness and watch functions | 
| Step Count | Yes | Yes | 
| Calorie Count | Yes | Yes | 
| Heart Rate Monitor | Yes | Yes | 
| Calendar | Yes | Yes | 
| Alarm Clock | Yes | Yes | 
| Number of Buttons | 2 | 2 | 
| Other Fitness Features | Activity Tracker, 123 Sports Mode Tracking, Sedentary Reminder, Sleep Monitor, Women health tracker | Sleep Monitoring, Blood Oxygen Monitor, 24x7 Heart Rate Monitor, 12 Sports Mode | 
| Other Watch Functions | Music Control, Remote Camera Control, Alarm, Timer, Stopwatch, Weather Forecast, Support For Multiple Watch Faces, A Rotating Crown Button | - | 
| Date & Time Display | - | Yes | 
| audio and video features | 
| Speaker | - | No | 
| Gesture Control | - | Yes | 
| Microphone | - | No |