  |  |  |  |  |
| RAM Memory | 128.0 mB | 512.0 mB | 512.0 mB | 512.0 mB | 768.0 mB |
|---|---|---|---|---|---|
| Internal storage space | 256.0 GB | 4.0 GB | N/A | 4.0 GB | 4.0 GB |
| CPU cores | N/A | Quad Core | N/A | Single Core | Dual Core |
| CPU speed | N/A | 1.2 GHz | N/A | 0.8 GHz | 1.0 GHz |
| Screen size | 1.54 in | 1.3 in | 1.56 in | 1.63 in | 1.3 in |
|---|---|---|---|---|---|
| Display technology | LCD | OLED | LCD | OLED | OLED |
| Screen resolution | 240 x 240 px | 320 x 320 px | 320 x 290 px | 320 x 320 px | 360 x 360 px |
| Type of glass | N/A | Plexiglas | N/A | Gorilla Glass | Gorilla Glass |
| Type of screen | N/A | Colour screen | N/A | Colour screen | Colour screen |
| Touchscreen | N/A | N/A | yes | N/A | N/A |
| Built-in camera | yes | no | N/A | no | no |
|---|---|---|---|---|---|
| Accelerometer | yes | N/A | N/A | yes | N/A |
| Heart rate monitor | yes | yes | yes | yes | yes |
| Microphone | yes | yes | N/A | yes | yes |
| Gyroscope | yes | yes | N/A | yes | yes |
| Pedometer | yes | N/A | yes | N/A | N/A |
| Ambient Light Sensor | N/A | yes | N/A | N/A | N/A |
| Barometer | N/A | yes | N/A | yes | yes |
| Compass | N/A | yes | N/A | yes | yes |
| Auto adjust to smartphone time | N/A | N/A | yes | N/A | N/A |
| Altimeter | N/A | N/A | N/A | yes | N/A |
| Phone Functionality | N/A | N/A | N/A | yes | yes |
| Case diameter | 1.69 in | 1.83 in | 1.81 in | 1.45 in | 1.81 in |
|---|---|---|---|---|---|
| Case height | 0.0 in | 2.11 in | N/A | 2.23 in | 1.93 in |
| Case thickness | 0.43 in | 0.38 in | 0.43 in | 0.44 in | 0.51 in |
| Weight | 1.53 oz | 2.19 oz | 1.73 oz | 2.6 oz | 2.19 oz |
| Replaceable wrist bands | yes | yes | yes | yes | N/A |
| Watch case material |
|
| Stainless steel | Stainless steel |
|
| Wrist band material |
|
| N/A |
|
|
| Colour of bracelet |
| Black | N/A |
|
|
| Anti scratch lens | yes | yes | yes | yes | N/A |
| Wrist band width | N/A | 0.87 in | N/A | 0.87 in | N/A |
| Water resistance | N/A | yes | yes | yes | yes |
| Fully waterproof | N/A | yes | yes | yes | no |
| IP code (level of dust/water resistance) | N/A | IP67 | N/A | IP68 | IP68 |
| Dust resistant | N/A | N/A | N/A | yes | N/A |
| Operating system |
| Android Wear 2.0 | Android 4.3+ | Tizen OS | Tizen OS |
|---|---|---|---|---|---|
| Smartphone remote features | Voice Control | Voice Control | Voice Control | N/A | N/A |
| Bluetooth | yes | yes | yes | yes | yes |
|---|---|---|---|---|---|
| Bluetooth version | 3.0 | 4.0 | 4.0 | 4.0 | 4.2 |
| Wi-Fi | yes | yes | yes | yes | yes |
| USB | yes | yes | N/A | yes | yes |
| Charging connection | Proprietary USB Cable | microUSB | Wireless | Wireless | N/A |
| Built-in navigation system | no | no | N/A | yes | yes |
| 3G (UMTS) | N/A | no | N/A | no | yes |
| 4G (LTE) | N/A | no | N/A | yes | no |
| NFC | N/A | no | N/A | yes | yes |
| Headphone connection | N/A | N/A | Bluetooth | Bluetooth | N/A |
| Wireless networking standard | N/A | N/A | N/A |
|
|
| GPS | N/A | N/A | N/A | yes | yes |
| GLONASS | N/A | N/A | N/A | yes | yes |
| Battery technology | Li-Ion | Li-polymer | N/A | Li-Ion | Li-Ion |
|---|---|---|---|---|---|
| Battery capacity | 400.0 mAh | 410.0 mAh | 320.0 mAh | 315.0 mAh | 380.0 mAh |
| Average battery life (standby) | 240.0 h | 24.0 h | 24.0 h | 150.0 h | 96.0 h |
| Battery life (running) | 24.0 h | 36.0 h | N/A | 25.0 h | 96.0 h |
| Wireless charging | N/A | N/A | N/A | yes | yes |
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