Apple Watch Series 4
Apple Watch Series 4, also known as Apple Watch S4, is a smart watch owned by Apple. It was officially released at the Apple Autumn New Product Launch in September 2018. It is equipped with watch OS 5 to display more notifications and content, with a larger display and Smaller border.Here is its main parameter:
| Announced | 2018, September |
| Status | Available. Released 2018, September |
| Dimensions | 44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in) |
| Weight | 48 g (1.69 oz) |
| Build | Stainless Steel frame; all-ceramic/sapphire crystal back |
| SIM | Electronic SIM card (eSIM) |
| 50m waterproof | |
| ECG certified (USA only) | |
| Type | LTPO OLED capacitive touchscreen, 16M colors |
| Size | 1.78 inches, 10.0 cm2 (~60.0% screen-to-body ratio) |
| Resolution | 448 x 368 pixels (~326 ppi density) |
| Protection | Sapphire crystal glass |
| 3D Touch display | |
| 1000 nits | |
| OS | watchOS 5.0, upgradable to 5.1.3 |
| Chipset | Apple S4 |
| CPU | Dual-core |
| GPU | PowerVR |
| Card slot | No |
| Internal | 16 GB |
| Loudspeaker | Yes |
| 3.5mm jack | No |
| WLAN | Wi-Fi 802.11 b/g/n |
| Bluetooth | 5.0, A2DP, LE |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, QZSS |
| NFC | Yes |
| Sensors | Accelerometer, gyro, heart rate (2nd gen), barometer |
| Audio player | |
| Photo viewer | |
| Siri natural language commands and dictation (talking mode) | |
| Non-removable Li-Ion battery | |
| Stand-by | Up to 18 h (mixed usage) |