  |  |  |  |  |
| Screen size | 1.34 in | 1.34 in | 1.85 in | 1.3 in | N/A |
|---|---|---|---|---|---|
| Display technology | LCD | LCD | OLED | OLED | OLED |
| Screen resolution | 300 x 300 px | 300 x 300 px | N/A | N/A | 96 x 64 px |
| Type of glass | Gorilla Glass | Gorilla Glass | Mineral glass | Mineral glass | N/A |
| Heart rate monitor | yes | yes | N/A | N/A | yes |
|---|---|---|---|---|---|
| Gyroscope | yes | yes | yes | yes | yes |
| Case diameter | 0.94 in | 0.94 in | 1.77 in | 1.73 in | 2.32 in |
|---|---|---|---|---|---|
| Case height | 0.94 in | 0.94 in | 1.77 in | 0.0 in | 1.18 in |
| Weight | 1.31 oz | 1.31 oz | 5.89 oz | N/A | 1.45 oz |
| Watch case material |
| Aluminum | Stainless steel | Stainless steel | N/A |
| Wrist band material | Silicone |
| Steel |
| N/A |
| Colour of bracelet |
|
|
|
| N/A |
| Case thickness | N/A | N/A | 0.51 in | 0.55 in | 0.35 in |
| Bluetooth | yes | yes | yes | yes | yes |
|---|---|---|---|---|---|
| Bluetooth version | 4.0 | 4.0 | 4.1 | N/A | 2.1 |
| Wi-Fi | yes | yes | N/A | N/A | N/A |
| Built-in navigation system | no | yes | yes | yes | N/A |
| NFC | N/A | yes | N/A | N/A | N/A |
| USB | N/A | N/A | N/A | N/A | yes |
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