| key specs |
| Display Size | 49mm | - |
| Compatible OS | iOS | - |
| Dial Shape | Rectangle | Round |
| Display Type | OLED Retina | AMOLED |
| Ideal For | Unisex | Unisex |
| Strap Colour | - | Black |
| Strap Material | - | Silicone |
| general |
| Brand | Apple | Xiaomi |
| Model | Watch Ultra 2 | Watch S1 Pro |
| Release date | September 12, 2023 | August 11, 2022 |
| Model Name | Watch Ultra 2 | Watch S1 Pro |
| Dial Shape | Rectangle | Round |
| Size | Large | Regular |
| Touchscreen | Yes | 1.47-inch |
| Water Resistant | Yes | 5ATM |
| Water Resistance Depth | 100m | - |
| Usage | Fitness & Outdoor | - |
| Ideal For | Unisex | Unisex |
| Model Number | - | M2134W1 |
| Dial Colour | - | Black |
| Strap Colour | - | Black |
| Strap Material | - | Silicone |
| product details |
| Maximum Operating Altitude | 9000 | - |
| Sensor | Compass, Always-On Altimeter, heart rate sensor, Accelerometer, Gyroscope, and Ambient light sensor | Heart rate sensor (including blood oxygen), acceleration sensor, gyroscope geomagnetic sensor, air pressure sensor, ambient light sensor , capacitive sensor, temperature sensor |
| Compatible Device | iOS | - |
| Notification | Yes | - |
| Battery Type | Lithium Ion | Lithium-ion polymer battery |
| Battery Life | 36 Hours | - |
| Rechargeable Battery | Yes | - |
| connectivity features |
| Call Function | Yes | - |
| Bluetooth | Yes | - |
| Wi-Fi | Yes | Yes |
| GPS | Yes | Yes |
| Call Features | International Emergency Calling | - |
| Other Connectivity Features | Emergency SOS | - |
| Bluetooth Version | - | Bluetooth v5.2 |
| Operating Range | - | 10m |
| platform and storage features |
| Operating System | watchOS 10 | - |
| Compatible Operating System | iOS | - |
| Processor Name | S9 SiP | - |
| camera and display features |
| Display Size | 49mm | - |
| Display Type | OLED Retina | AMOLED |
| Backlight Display | Yes | - |
| Other Display Features | LTPO OLED Always-On Retina display | - |
| Display Resolution | - | 480x480 |
| fitness and watch functions |
| Step Count | Yes | - |
| Calorie Count | Yes | - |
| Heart Rate Monitor | Yes | Yes |
| Altimeter | Yes | - |
| Compass | Yes | Yes |
| Calendar | Yes | - |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Language | English | - |
| Other Fitness Features | Blood Oxgen Sensor, ECG sensor | - |
| audio and video features |
| Speaker | Yes | - |
| Microphone | Yes | - |
| dimensions |
| Width | - | 46mm |
| Height | - | 46mm |
| Thickness | - | 11.28mm |