Technical data sheet
Full Specifications
Network
| Technology | No cellular connectivity |
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| 2G bands | N/A |
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| GPRS | No |
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| EDGE | No |
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Launch
| Announced | 2014, September. Released 2015, May |
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| Status | Discontinued |
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Body
| Dimensions | 38.6 x 33.3 x 10.5 mm (1.52 x 1.31 x 0.41 in) |
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| Weight | 40 g body (2.72 oz) |
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| SIM | No |
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| Build | Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame |
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Battery
| Type | Retina OLED, 450 nits (peak) |
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| Charging | Wireless |
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Display
| Size | 1.5 inches |
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| Resolution | 340 x 272 pixels (~290 ppi density) |
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| Protection | Sapphire crystal glass |
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Platform
| OS | watchOS 1.0, upgradable to watchOS 4.3.2 |
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| Chipset | Apple S1 (28 nm) |
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| CPU | 520 MHz Cortex-A7 |
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| GPU | PowerVR SGX543 |
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Memory
| Card slot | No |
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| Internal | 8GB 512MB RAM |
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Sound
| Loudspeaker | Yes |
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| 3.5mm jack | No |
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Comms
| WLAN | Wi-Fi 802.11 b/g/n |
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| Bluetooth | 4.0, LE |
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| Positioning | No |
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| NFC | Yes |
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| Radio | No |
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| USB | No |
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Features
| Sensors | Accelerometer, gyro, heart rate |
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Misc
| Colors | Stainless Steel/Red, White, Brown/Black/Blue/Red/Marigold/Jay Buckle, Blue/Stone Leather Loop, Silver/Space Black Milanese Loop, Link Bracelet, Space Black Stainless Steel/Black, Black Link Bracelet, Pearl Woven Nylon |
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| Price | About 650 EUR |
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| Models | A1553 |
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