Apple Watch SE (Cellular, Global, 40 mm) Specs

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Apple Watch SE – A2355 – MYEH2B/A

About this Apple Watch

The Apple Watch SE – A2355 watch was introduced on September 18, 2020, to be sold globally (except in the United States, Canada, Mexico, and Puerto Rico). This unit features high performance and a low price all at the same time. It has no advanced health sensors (except heart rate sensors and notifications) and is a little slower. Still, on the other hand, it can use an Internet connection and a connection to an iPhone 6 or later (with iOS14 or later) to perform some additional functions.

The A2355 has a 30% larger display and is up to two times faster than the Apple Watch Series 3. Apple LTPO technology provides less power consumption while the display is turned on and is combined with an OLED screen which is also covered with Ion-X glass to enable scratch resistivity. The touch-capable display has a Digital Crown with haptic feedback and an “Always on” Altimeter.

The flash memory has 32GB storage, and 1GB of RAM is enabled for the user requirements. The battery life is generally estimated at 18 hours, but it usually depends on specific usage. The aluminum case has many options, such as Silver with a White Sport Band or Deep Navy Sport Loop; Space Gray with a Black Sport Band or Charcoal Sport Loop; Gold with a Pink Sand Sport Band or Plum Sport Loop. Also, many combinations are available from Apple via customization if needed.

Apple S5

1GB

32 GB

1.5-18 Hours

Storage & Memory

The A2355 has 32GB of flash storage and 1GB of RAM.

Screen Size and Resolution

The 40 mm display has a 324 x 394 pixel resolution. The height is 40 mm, the width is 34 mm, and the depth is 10.7 mm. The weight is 30.68 g.

OS & Processor

The Apple Watch Series SE comes with Apple watchOS 7 for its operating system and is powered by a 64-bit dual-core Apple S5 processor, which has a system in package (SIP) architecture.

Battery

The Apple Watch Series SE battery is a rechargeable Li-Ion battery that is expected to go up to 18 hours overall. Still, it can be as low as 1.5 hours while using the talking option – connected to the iPhone.

Size and Weight

The height of this iPhone is 5.94 inches, the width is 2.98 inches, the depth is 0.33 inches and the weight is only 6.84 ounces.

Inclusive Features

Digital Crown and Retina LTPO OLED touch-capable display with haptic feedback
Wireless Charging
LTE and UMTS, Bluetooth 5.0 and WiFi 802.11 b/g/n 2.4 GHz
Water resistant up to 50 meters of water
GPS tracker
Always-On Altimeter
Accelerometer and fall detection
Emergency SOS with international emergency calling
Compatibility with watchOS 7
Magnetometer enabling the compass function
Apple Pay

Introduction Date: September 15, 2020					Discontinued Date: September 7, 2022
Processors					Memory
Processors		Dual Core			Onboard RAM	1 GB
Processor Speed		N/A			Storage
Processor Type		Apple S5			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 GHz	Case Type		Watch
Standard Bluetooth				5.0	Form Factor		Apple Watch SE (40 mm)
Cell Network				N/A	Housing Color		Aluminum
Battery Details					Controller		Digital Crown
Battery Type	Lithium Ion				Apple Order Number		MYEH2B/A
Battery Life	1.5-18 Hours				Apple Subfamily		Watch SE 40 mm
Stand by Time	N/A				Apple Model Number		A2355 (EMC 3487)
Operating System and Display					Model ID		Watch5,11
Pre-installed OS			watchOS 7.0 (18R382)		Camera		N/A
Maximum OS			Current		Dimensions		1.57 x 1.34 x 0.41
Built-in Display			1.8″ OLED		Average Weight		1.08 ounces
Display Resolution			324×394		Minimum iPhone Support		N/A

Identifier reference: MYEH2B/A, A2355, EMC 3487. Use these together because one Apple identifier can sometimes cover multiple configurations.

Last reviewed by Techable: September 5, 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: MYEH2B/A
Model Number: A2355
EMC: 3487
Year: 2022

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

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Search by A-number, EMC, order number, or model identifier.

Next steps

Use the spec table to confirm the exact device, then choose the right lookup, buy, or sell path.

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Common questions

Is MYEH2B/A the same as A2355?

Not exactly. MYEH2B/A usually points to a specific retail configuration, while A2355 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What Apple Watch is model A2355?

A2355 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 3487 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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