| key specs |
| Strap Colour | Black, Gold, Silver, Gunmetal | Black, Green, Pink |
| Display Size | 35mm | - |
| Compatible OS | Android, iOS | Android, iOS |
| Dial Shape | Round | Rectangle |
| Strap Material | - | Silicone |
| general |
| Brand | Pebble | Amazfit |
| Model | Cosmos Bold Pro | Bip U |
| Release date | May 3, 2023 | October 15, 2020 |
| Model Number | PFB42 | - |
| Model Name | Cosmos Bold Pro | Bip U |
| Dial Shape | Round | Rectangle |
| Strap Colour | Black, Gold, Silver, Gunmetal | Black, Green, Pink |
| Size | Regular | Regular |
| Interchangeable Strap | Yes | Yes |
| Water Resistant | IP67 | 5 ATM |
| Dial Material | Metal | Polycarbonate |
| Strap Material | - | Silicone |
| Touchscreen | - | Yes |
| Water Resistance Depth | - | 50 metres |
| Dial Colour | - | Black, Green, Pink |
| product details |
| Sensor | SpO2 sensor, Heart Rate tracker, Sleep tracker | BioTracker 2 PPG Biological optical sensor, 6-axis acceleration sensor |
| Compatible Device | Android, iOS | Android, iOS |
| Notification | Yes | Yes |
| Notification Type | Calls, Sms, Email, Whatsapp and Social Media | - |
| Battery Life | 5 days | 9 days |
| Charger Type | Wired charging | 2 Pogo Pin Charger |
| Stand By Time | 7 days | - |
| Rechargeable Battery | Yes | - |
| Other Features | Alarm & Notification, Zen Mode, Sleep, Display Timer, Flashlight, Find Phone, Voice Assistant, Music, Camera Shutter, Menu Style | - |
| Charge Time | - | 2 hours |
| connectivity features |
| Call Function | Yes | - |
| Bluetooth | Bluetooth | Yes |
| Messaging Support | Yes | - |
| Bluetooth Version | - | 5.0 |
| Wi-Fi | - | Yes |
| platform and storage features |
| Compatible Operating System | Android, iOS | Android, iOS |
| Operating System | - | RTOS |
| camera and display features |
| Display Resolution | 360x360 pixels | 320x302 |
| Display Size | 35mm | - |
| Other Display Features | 500 nits brightness, IPS HD display | Anti-Fingerprint Coating, 2.5D Corning Gorilla Glass 3 |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Calendar | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Number of Buttons | 1 | 1 |
| Other Fitness Features | Steps pedometer, SPO2, Heart Rate Monitor, over 100 sports modes | 60 sports modes |
| Other Watch Functions | Alarm & Notification, Zen Mode, Sleep, Find Phone, Voice Assistant, Music, Camera Shutter, Menu Style | 24 hour heart rate monitoring, sleep quality monitoring, blood oxygen level sensor, menstrual cycle tracker |
| Calorie Count | - | Yes |
| Compass | - | Yes |
| Language | - | English |
| dimensions |
| Width | - | 35.5 |
| Height | - | 40.9 |
| Thickness | - | 11.4 |
| Weight (g) | - | 31.00 |
| audio and video features |
| Speaker | - | Yes |
| Microphone | - | Yes |
| Other Multimedia Features | - | show notifications, control music, set alarms, remote control the phone’s camera |