Apple Watch Series 8 (Cellular, China, 41 mm) Specs

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Apple Watch – A2857 – MNJ03CH/A

About this Apple Watch

Apple unveiled the Apple Watch Series 8 – A2857 on September 7, 2022. This cellular model is only available for purchase in mainland China, Hong Kong, and Macau. This model is nearly identical to its predecessor (Apple Watch Series 7). This model also has additional features, including an improved gyroscope, a temperature sensor for expanded health monitoring, Crash detection for car crashes, and a Low Power option for extended battery life. Apple also claimed that the S8 processor of this device delivers 20% more performance than the S5 processor. This model comes in both aluminum and stainless steel casings. It must be connected to an iPhone 8 or later (with iOS16 or later) to use the Internet and perform additional functions.

The Apple Watch Series 8 – A2875 model has a 41 mm case size and a 1.8-inch Always-On Retina LTPO OLED display. It is a touch-capable display that delivers a resolution of 352 x 430. The display area of this device is 904 square mm with rounded corners. The front is covered with either Ion-X glass (aluminum case) or Sapphire crystal (stainless steel case) for scratch resistance. The backside of this model uses Sapphire crystal which connects to the charger.

This Apple Watch model comes with 1 GB RAM and 32 GB internal flash storage and haptic feedback for the Digital Crown, which gives users a more tactile experience as they scroll through content. Apple claims that the battery life of this device is 18 hours, depending on the mode of usage.

This Apple Watch is available in four colors for its aluminum case: warm Gray Starlight, nearly black Midnight, Silver, and (PRODUCT) RED. It also comes in three stainless steel options: Gold, Graphite, and Silver.

Apple S8

1 GB

32 GB

18 Hours

Storage & Memory

The internal onboard RAM of this device is 1 GB. The flash storage is 32 GB for this Apple Watch.

Screen Size and Resolution

This model is equipped with a 1.8-inch Always-On Retina LTPO OLED display that offers a resolution of 352 x 430. It has a display area of 904 square mm with rounded edges. The brightness level of this display is 1000 nits. The stainless steel casing is fitted with a Sapphire crystal cover, while the aluminum version utilizes Ion-X glass for durability and protection against scratches.

OS & Processor

The device uses a 64-bit dual-core S8 processor with System In Package (SIP) architecture to support multitasking capabilities. The pre-installed watchOS is watchOS 9 (20R361) and it also supports the current version of the watchOS.

Battery

The built-in Li-Ion battery of this device provides a battery life of 18 hours, depending on usage. When used with Low Power Mode, it can reach up to 36 hours, which disables the Always-On Display and other features to preserve the battery.

Size and Weight

The aluminum configuration of this model weighs around 1.13 ounces (31.9 grams), and the stainless steel configuration has 1.49 ounces (42.3 grams) weight. This Apple Watch Series 8 – A2875 is 1.61 inches in height x 1.37 inches in width x 0.42 inches in depth.

Inclusive Features:

Display is the high definition LCD, 6.1 inches and resolution is 1792×828, 326 ppi
Haptic touch
3 cameras with Wide and Ultra Wide field of view (120 degrees)
Front camera is tucked in a notch
12MP pictures and 4K video shooting
1.8 and 2.4 aperture and optical image stabilization
HD 1080p video recording at 25,30, and 60 fps and slow motion support
Night mode operation ability
iPhone 11 model A2221 Apple A13 Bionic 64-bit processor with six cores running on 2.66GHz
4 GB of RAM and up to 256 GB of flash memory
Dual-SIM cards (1 eSIM and 1 nano-SIM ).
Fast charge capable lithium-ion battery with wireless charging possibility
Small size and weight (only 6.84 Oz)
Face and speech recognition including various software support
Supports carrier bands in many countries around the Globe
Wifi and Bluetooth communication
Headphone accommodation and conversation boost feature
Sound recognition and notification for specific sounds
Assistive listening feature for loud places and environments
Apple pay and purchase ability
NFC with reader mode
The unit is protected from water, dust and is splash resistant

Introduction Date: September 7, 2022					Discontinued Date: N/A
Processors					Memory
Processors		Dual Core			Onboard RAM	1 GB
Processor Speed		N/A			Storage
Processor Type		Apple S8			Capacity	32 GB
Connectivity Details					Song Capacity	N/A
USB Support				N/A	Photo Capacity	N/A
FireWire Support				N/A	Description
Standard Wireless				802.11b/g/n 2.4/5 GHz	Case Type		Watch
Standard Bluetooth				5.3	Form Factor		Apple Watch Series 8 (41 mm)
Cell Network				N/A	Housing Color		Aluminum
Battery Details					Controller		Digital Crown
Battery Type	Lithium Ion				Apple Order Number		MNJ03CH/A
Battery Life	18 Hours				Apple Subfamily		Watch Series 8 41 mm
Stand by Time	N/A				Apple Model Number		A2857 (EMC 8096)
Operating System and Display					Model ID		Watch6,16
Pre-installed OS			watchOS 9 (20R361)		Camera		N/A
Maximum OS			Current		Dimensions		1.61 x 1.37 x 0.42
Built-in Display			1.8″ OLED		Average Weight		1.13/1.49 ounces
Display Resolution			352×430		Minimum iPhone Support		N/A

Identifier reference: MNJ03CH/A, A2857, EMC 8096. Use these together because one Apple identifier can sometimes cover multiple configurations.

Last reviewed by Techable: September 4, 2025Identifiers checked: order number, A-number, EMC, and model identifier when available.

Model summary

This Apple Watch at a glance

Family: Apple Watch
Order Number: MNJ03CH/A
Model Number: A2857
EMC: 8096
Year: 2023

Use the order number, A-number, EMC, and model identifier together when comparing, buying, or selling this device.

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Next steps

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Common questions

Is MNJ03CH/A the same as A2857?

Not exactly. MNJ03CH/A usually points to a specific retail configuration, while A2857 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What Apple Watch is model A2857?

A2857 is the Apple A-number shown for this Apple Watch family. Use the order number, EMC, and model identifier on this page to narrow the exact configuration.

What does EMC 8096 mean?

The EMC number is another Apple hardware identifier. It helps separate closely related models that may share a similar name, year, or A-number.

Can the RAM or SSD be upgraded?

Check the spec table for the exact configuration. Many newer Apple Silicon Macs have memory and storage integrated into the board, so RAM and SSD upgrades are often not practical after purchase.

What macOS versions work with this model?

Use the model identifier, release year, and processor family from the spec table when checking macOS compatibility. Compatibility can change as Apple releases new macOS versions.

Is this Apple Watch still worth buying used?

It can be, depending on price, battery health, memory, storage, and condition. Compare this exact order number and model identifier against similar Techable listings before buying.

How much is this Apple Watch worth?

Value depends on RAM, storage, battery health, cosmetic condition, accessories, and market demand. Use the SellMac path on this page for a quote or use the identifiers here when comparing resale prices.

What should I search if this page is not the exact configuration?

Search the order number first when available, then compare the A-number, EMC, model identifier, year, chip, RAM, and storage. The same A-number can cover more than one configuration.

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