| Introduction Time | 2017, September | May 31, 2021 |
|---|---|---|
| Availability Status | Available. Released September 2017 | Available, released June 1, 2021 |
| Size and Dimensions | 38.6 x 33.3 x 11.4 mm | 46 x 38.4 x 13 mm |
|---|---|---|
| Product Weight | 28.7 gram (g) | 43 gram (g) |
| Compatible SIM Card Types | Electronic SIM card (Apple eSIM) | eSIM |
|---|---|---|
| Other Body Features | Waterproof up to 50 meters / Ceramic back, aluminum frame | Waterproof / Display with curved edges (2.5D) |
| Display Technology | ||
|---|---|---|
| Screen Size | 1.5 inch (~55.4% screen-to-body ratio) | 1.78 inch (~56.8% screen-to-body ratio) |
| Display Resolution | ||
| Multi-Touch Capability | Yes | - |
| Screen protector type | Ion-X glass coating | Corning Gorilla Glass |
| Display Technical Details | 3D Touch Display / 1000 nits display brightness | 450 nits brightness |
| OS Version | ||
|---|---|---|
| Chip Model | Qualcomm Snapdragon Wear 4100 (12nm) |
| CPU | Dual-core | |
|---|---|---|
| GPU Model | - |
| Internal Memory Capacity | 16GB, 768MB RAM (unconfirmed) | 8GB with 1GB RAM |
|---|
| Alert Type | Vibrate; Ringtones | - |
|---|---|---|
| Speaker Type | Yes | Yes |
| Battery Type and Capacity | Non-removable 279 mAh Li-Ion battery (1.07 Wh) | Non-removable 430 mAh Li-Ion battery |
|---|---|---|
| Battery Standby Time | Up to 18 hours (combined usage) | Up to 36 hours |
| Smart Sensors | Accelerometer, Gyroscope, Heart rate sensor, Barometer | Accelerometer, Heart rate sensor with SpO2 (blood oxygen level calculation) capability, Gyroscope, Barometer, Compass |
|---|---|---|
| Messaging Method | SMS, Email, IM | - |
| Other Features and Capabilities | MP3 player / Photo viewer / Siri voice commands (talking mode) / Supports wireless charging | Supports various sport modes, Watch face customization capability, Heart rate monitoring, Blood pressure measurement, Blood oxygen level measurement, Sleep monitoring, Breathing exercise program, Phone notification display, Alarm clock, Timer |
| Communication Technologies | GSM / HSPA / LTE (LTE version only) |
|---|
| Wireless Network Type | ||
|---|---|---|
| Bluetooth Support | 4.2, A2DP | |
| GPS Support | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, BDS, QZSS |
| NFC Support | Yes | Yes |
| USB Connections Type | No | No, charges via proprietary charging dock with USB Type-C port |
| Available Color Options | Silver, Gold, Gray | Black, Light Blue |
|---|---|---|
| Global Price Range |
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