| key specs |
| Strap Colour | Black, Silver, Gold, Active Black, Brown | Black, Gold, Silver, Gunmetal |
| Display Size | 36mm | 35mm |
| Compatible OS | Android, iOS | Android, iOS |
| Strap Material | Stainless Steel | - |
| Dial Shape | Round | Round |
| general |
| Brand | Fire-Boltt | Pebble |
| Model | Ultimate | Cosmos Bold Pro |
| Release date | June 19, 2023 | May 3, 2023 |
| Model Number | BSW158 | PFB42 |
| Model Name | Ultimate | Cosmos Bold Pro |
| Dial Colour | Black | - |
| Dial Shape | Round | Round |
| Strap Colour | Black, Silver, Gold, Active Black, Brown | Black, Gold, Silver, Gunmetal |
| Strap Material | Stainless Steel | - |
| Touchscreen | Yes | - |
| Water Resistant | IP68 | IP67 |
| Size | - | Regular |
| Interchangeable Strap | - | Yes |
| Dial Material | - | Metal |
| 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 | SpO2 sensor, Heart Rate tracker, Sleep tracker |
| Compatible Device | Android, iOS | Android, iOS |
| Notification | Yes | Yes |
| Notification Type | Calls, Sms, Whatsapp and Social Media | Calls, Sms, Email, Whatsapp and Social Media |
| Battery Type | Lithium Ion | - |
| Battery Life | 7 days | 5 days |
| Charge Time | 2 hours | - |
| Stand By Time | 20 days | 7 days |
| Rechargeable Battery | Yes | Yes |
| Charger Type | - | Wired charging |
| Other Features | - | Alarm & Notification, Zen Mode, Sleep, Display Timer, Flashlight, Find Phone, Voice Assistant, Music, Camera Shutter, Menu Style |
| connectivity features |
| Call Function | Yes | Yes |
| Bluetooth | Bluetooth | Bluetooth |
| Bluetooth Version | Bluetooth 5.0 | - |
| Messaging Support | - | Yes |
| platform and storage features |
| Compatible Operating System | Android, iOS | Android, iOS |
| camera and display features |
| Display Resolution | 240 x 240 pixels | 360x360 pixels |
| Display Size | 36mm | 35mm |
| Other Display Features | - | 500 nits brightness, IPS HD display |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | - |
| Heart Rate Monitor | Yes | Yes |
| Calendar | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Number of Buttons | 2 | 1 |
| Other Fitness Features | Activity Tracker, 123 Sports Mode Tracking, Sedentary Reminder, Sleep Monitor, Women health tracker | Steps pedometer, SPO2, Heart Rate Monitor, over 100 sports modes |
| Other Watch Functions | Music Control, Remote Camera Control, Alarm, Timer, Stopwatch, Weather Forecast, Support For Multiple Watch Faces, A Rotating Crown Button | Alarm & Notification, Zen Mode, Sleep, Find Phone, Voice Assistant, Music, Camera Shutter, Menu Style |
| Date & Time Display | - | Yes |