  |  |  |  |  |
| Screen size | 1.4 in | 1.63 in | 1.2 in | 1.6 in | 1.97 in |
|---|---|---|---|---|---|
| Screen resolution | 400 x 400 px | 320 x 320 px | 360 x 360 px | 320 x 320 px | 128 x 128 px |
| Display technology | N/A | OLED | OLED | N/A | LED |
| Type of glass | N/A | Gorilla Glass | Gorilla Glass | N/A | N/A |
| Type of screen | N/A | Colour screen | Colour screen | N/A | N/A |
| Touchscreen | N/A | N/A | yes | N/A | N/A |
| Accelerometer | yes | yes | yes | yes | yes |
|---|---|---|---|---|---|
| Heart rate monitor | yes | yes | yes | N/A | N/A |
| Compass | yes | N/A | N/A | yes | yes |
| Gyroscope | yes | yes | yes | yes | N/A |
| Pedometer | yes | N/A | yes | N/A | yes |
| Built-in camera | N/A | no | no | N/A | N/A |
| Microphone | N/A | yes | yes | N/A | N/A |
| Ambient Light Sensor | N/A | N/A | yes | yes | N/A |
| Barometer | N/A | N/A | yes | N/A | N/A |
| Altimeter | N/A | N/A | N/A | N/A | yes |
| Case diameter | 1.77 in | 1.49 in | 1.67 in | 1.97 in | 1.97 in |
|---|---|---|---|---|---|
| Case thickness | 0.51 in | 0.39 in | 0.45 in | 0.39 in | 0.59 in |
| Anti scratch lens | yes | N/A | N/A | yes | yes |
| Water resistance | yes | yes | yes | yes | yes |
| Dust resistant | yes | N/A | yes | yes | N/A |
| IP code (level of dust/water resistance) | IP67 | IP67 | IP68 | N/A | N/A |
| Case height | N/A | 2.31 in | 1.96 in | N/A | N/A |
| Weight | N/A | 1.94 oz | 1.66 oz | 1.59 oz | 2.82 oz |
| Watch case material | N/A |
| Stainless steel | Stainless steel | Polyamide |
| Wrist band material | N/A | Rubber |
|
| Silicone |
| Colour of bracelet | N/A |
|
| N/A | N/A |
| Fully waterproof | N/A | N/A | yes | yes | yes |
| Replaceable wrist bands | N/A | N/A | N/A | yes | yes |
| Bluetooth | yes | yes | yes | yes | yes |
|---|---|---|---|---|---|
| Bluetooth version | 4.1 | 4.0 | 4.1 | 4.0 | 4.0 |
| Built-in navigation system | yes | N/A | no | N/A | N/A |
| 4G (LTE) | N/A | no | yes | N/A | N/A |
| Wi-Fi | N/A | no | yes | yes | N/A |
| NFC | N/A | no | yes | yes | N/A |
| USB | N/A | yes | yes | N/A | N/A |
| Infrared (IR) | N/A | yes | N/A | N/A | N/A |
| 3G (UMTS) | N/A | N/A | no | N/A | N/A |
| Wireless networking standard | N/A | N/A |
| N/A | N/A |
| Charging connection | N/A | N/A | Wireless | microUSB | Proprietary USB Cable |
| Headphone connection | N/A | N/A | Bluetooth | Bluetooth | N/A |
| GPS | N/A | N/A | N/A | yes | yes |
| Battery technology | Li-Ion | Li-Ion | Li-Ion | Li-polymer | Li-Ion |
|---|---|---|---|---|---|
| Battery capacity | 300.0 mAh | 300.0 mAh | 250.0 mAh | 420.0 mAh | N/A |
| Average battery life (standby) | N/A | 144.0 h | 24.0 h | 48.0 h | N/A |
| Battery life (running) | N/A | 48.0 h | 24.0 h | N/A | N/A |
| Wireless charging | N/A | N/A | yes | N/A | N/A |
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