| Physical features | Apple Watch |
| Model | |
| Other model names | Apple Watch 1st gen (2015) A1553 Stainless Steel |
| Country or region available | 
(Global, International) |
| Brand | Apple |
| Release date | April, 2015 |
| Depth | 10.5 millimeters (0.41 inches) |
| Size (width x height) | 33.3 x 38.6 millimeters (1.31 x 1.52 in) |
| Weight | 87 grams (3.05 ounces) |
| Qwerty physical keyboard | Not supported |
| Antenna | Not supported |
| Build, materials | Stainless steel body, glass front, ceramic back |
| Protection against water and others | IPX7 certified: water resistant up to 1 meter and 30min |
| System (OS) | Apple Watch |
| Operating system | WatchOS 1.0 |
| Firmware update | WatchOS 4.0 |
| Hardware | Apple Watch |
| Chipset | 32bit - Apple S1 (28nm) |
| CPU processor | 520Mhz Single-Core ARM Cortex-A7 |
| GPU graphical controller | PowerVR SGX543 |
| RAM memory | 512MB LPDDR |
| Internal storage | 8GB (6GB available) |
| External storage | Not supported |
| Display | Apple Watch |
| Display type | AMOLED |
| Screen size | 1.34" inches |
| Screen-to-body ratio | ~44% (screen-to-body ratio) |
| Display resolution | 272x340 pixels |
| Touchscreen | Capacitive Multitouch |
| Pixel density (dot pitch) | 325 PPI |
| Colors | 16 million |
| Scratch-resistant glass | Sapphire Glass |
| Display features | feature not registered |
| Mobile networks | Apple Watch |
| Dual-SIM | Not supported |
| SIM card | Not supported |
| Maximum download/upload | feature not registered |
| Network technology | feature not registered |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Not supported |
| Primary 2G network | Not supported |
| Primary 3G network | Not supported |
| Primary 4G network | Not supported |
| Primary 5G network | Not supported |
| Primary data network | Not supported |
| Secondary 2G network | Not supported |
| Secondary 3G network | Not supported |
| Secondary 4G network | Not supported |
| Secondary data network | Not supported |
| Calling | Apple Watch |
| Messaging | SMS, E-mail |
| Speakerphone | Supported |
| Video calling | Not supported |
| Call control | Not supported |
| Camera | Apple Watch |
| Back camera (main camera) | Not supported |
| Main camera resolution | Not supported |
| Video recording (primary) | Not supported |
| Flash | Not supported |
| Focal aperture | feature not registered |
| Focal length | feature not registered |
| Sensor size | feature not registered |
| Pixel size | feature not registered |
| Autofocus | Not supported |
| Touch focus | Not supported |
| Image stabilization | feature not registered |
| Zoom | Not supported |
| Face/smile detection | Not supported |
| BSI sensor | Not supported |
| HDR | Not supported |
| 2ª camera | Apple Watch |
| Front camera (secondary) | Not supported |
| Front camera resolution | Not supported |
| Video recording (secondary) | Not supported |
| Front flash | Not supported |
| Focal aperture | feature not registered |
| Focal length | feature not registered |
| Sensor size | feature not registered |
| Pixel size | feature not registered |
| Multimedia | Apple Watch |
| Radio | Not supported |
| TV | Not supported |
| Video formats | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, eAAC+, FLAC |
| Connectivity | Apple Watch |
| USB | Not supported |
| TV output | Not supported |
| Audio output | Not supported |
| Bluetooth | 4.0 + A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) |
| DLNA | Not supported |
| NFC | Supported |
| GPS | Not supported |
| Infrared port | Not supported |
| Other functions | Apple Watch |
| Active noise cancellation | Not supported |
| Vibrating alert | Supported |
| Ringtones | feature not registered |
| Web browser | Not supported |
| Sensors | Accelerometer
Ambient Light sensor
Gyroscope
Heart rate
Pedometer
|
| Other features | - Watch colors: Silver, Space gray
- Watch bands: White, Black, Blue, Pink, Brown, Gray, Steel
- Band material: Leather, Stainless steel, Fluoroelastomer plastic
- iOS 8.2 or higher compatible
- Digital Crown
- MagSafe charging |
| Power supply | Apple Watch |
| Battery | Li-Ion: Lithium-Ion (Non removable) |
| Battery capacity | 205 mAh |
| Charger, watts | Standard charging
Magnetic charging (dock) |
| Talk time autonomy | 180 minutes | 3 hours | 0.1 day |
| Standby | 1080 minutes | 18 hours | 0.8 day |
| Radiation rate | Apple Watch |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered |