Apple Watch SE 2nd Gen

Model

• Apple Watch SE (2nd generation)

Case & Finish

• Material: Aluminum

• Case colors: Midnight, Starlight, Silver

Sizes & Fit

• Available sizes: 40 mm, 44 mm

• 40 mm fits wrists ~130–200 mm

• 44 mm fits wrists ~140–245 mm

Dimensions & Weight

• 40 mm: Height 40.0 mm × Width 34.0 mm × Depth 10.7 mm

• 44 mm: Height 44.0 mm × Width 38.0 mm × Depth 10.7 mm

• Weight (approx, GPS only): 40 mm — 26.4 g; 44 mm — 32.9 g

• Display resolution: 40 mm — 324 × 394 pixels; 44 mm — 368 × 448 pixels

Display

• Retina LTPO OLED display (Ion-X strengthened glass)

• Always-on: Not included on SE (feature varies by model)

• Brightness: Retina-level (typical Apple watch brightness)

Processor & OS

• Chip: Apple S-series (SE Gen 2 level; improved performance vs. original SE)

• watchOS compatible (pairing requires iPhone with required iOS version)

Connectivity & Sensors

• GPS (GPS only model) or GPS + Cellular (carrier dependent)

• Bluetooth (for pairing to iPhone), Wi-Fi

• Sensors: Optical heart sensor (heart rate), accelerometer, gyroscope, always-on altimeter (model features vary), ambient light sensor

• Safety: Crash Detection, Fall Detection (where available by software/region)

Health & Fitness Features

• Heart rate monitoring (resting, walking averages, high/low heart rate notifications)

• Workout tracking (multiple workout types), Activity rings

• Sleep tracking (basic sleep features via watchOS)

• Emergency SOS and International emergency calling (cellular models and supported regions)

Water Resistance

• Water resistance suitable for shallow-water activities (swimproof). Rinse & dry after exposure to salt or pool water.

Battery & Charging

• Typical battery life: up to ~18 hours (depends on usage and settings)

• Charging: Magnetic charging cable (USB-C or USB depending on included cable in region)

Storage

• Internal storage for apps and media (onboard; usable app storage varies by OS)

Compatibility

• Requires iPhone (model and iOS version per Apple requirements)

• Some features require carrier support for cellular models

Included in the Box

• Apple Watch (selected size and color), magnetic charging cable, band (S/M and/or M/L depending on region), Quick Start guide

What’s the difference between GPS and GPS + Cellular models?

GPS-only models connect to the internet and iPhone via the paired phone or Wi-Fi for most features. GPS + Cellular models include a cellular radio so you can call, text, stream music, and use data when your iPhone isn’t nearby (requires a carrier plan).

Is the Apple Watch SE 2 suitable for swimming?

The watch is water resistant for shallow-water activities such as pool swimming, but it’s not meant for deep-water diving or high-velocity water sports. Rinse the watch and band after exposure to salt or chlorinated water and follow the care instructions.

Which iPhone do I need to pair with this watch?

You need a compatible iPhone model and iOS version as specified by Apple (generally iPhone 8 or later and up-to-date iOS for SE Gen 2 at its release). Check current Apple requirements when listing to ensure buyers have the correct iPhone/iOS.