  |  |  |  |  |
| Display technology | OLED | LCD | LCD | N/A | OLED |
|---|---|---|---|---|---|
| Screen resolution | 96 x 64 px | 144 x 168 px | 144 x 168 px | 180 x 180 px | 320 x 320 px |
| Screen size | N/A | 1.26 in | 1.25 in | 1.0 in | 1.63 in |
| Type of glass | N/A | Gorilla Glass | Gorilla Glass | N/A | Gorilla Glass |
| Type of screen | N/A | Monochrome | Colour screen | N/A | Colour screen |
| Heart rate monitor | yes | yes | N/A | N/A | yes |
|---|---|---|---|---|---|
| Gyroscope | yes | yes | yes | yes | yes |
| Built-in camera | N/A | no | no | N/A | no |
| Microphone | N/A | yes | yes | N/A | yes |
| Accelerometer | N/A | N/A | yes | yes | yes |
| Ambient Light Sensor | N/A | N/A | yes | yes | N/A |
| Auto adjust to smartphone time | N/A | N/A | yes | N/A | N/A |
| Compass | N/A | N/A | yes | yes | N/A |
| Magnetometer | N/A | N/A | yes | yes | N/A |
| Pedometer | N/A | N/A | yes | yes | N/A |
| Case diameter | 2.32 in | 1.56 in | 1.59 in | 1.5 in | 1.49 in |
|---|---|---|---|---|---|
| Case height | 1.18 in | 1.19 in | 1.48 in | N/A | 2.31 in |
| Case thickness | 0.35 in | 0.44 in | 0.37 in | 0.28 in | 0.39 in |
| Weight | 1.45 oz | 1.12 oz | 1.5 oz | 0.99 oz | 1.94 oz |
| Watch case material | N/A | Plastic/Synthetic |
| Stainless steel |
|
| Wrist band material | N/A | Silicone |
|
| Rubber |
| Colour of bracelet | N/A |
|
| N/A |
|
| Water resistance | N/A | yes | yes | yes | yes |
| Fully waterproof | N/A | no | yes | N/A | N/A |
| Wrist band width | N/A | N/A | 0.87 in | 0.55 in | N/A |
| Anti scratch lens | N/A | N/A | yes | yes | N/A |
| Dust resistant | N/A | N/A | yes | N/A | N/A |
| Replaceable wrist bands | N/A | N/A | N/A | yes | N/A |
| IP code (level of dust/water resistance) | N/A | N/A | N/A | N/A | IP67 |
| Bluetooth | yes | yes | yes | yes | yes |
|---|---|---|---|---|---|
| Bluetooth version | 2.1 | 4.0 | 4.0 | 4.0 | 4.0 |
| USB | yes | no | yes | N/A | yes |
| 3G (UMTS) | N/A | no | no | N/A | N/A |
| 4G (LTE) | N/A | no | no | N/A | no |
| Wi-Fi | N/A | no | no | N/A | no |
| NFC | N/A | no | no | N/A | no |
| Built-in navigation system | N/A | no | no | N/A | N/A |
| Charging connection | N/A | N/A | Proprietary USB Cable | Proprietary USB Cable | N/A |
| Infrared (IR) | N/A | N/A | N/A | N/A | yes |
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