Apple

Apple MRMH3LL/A Watch Series 9 Cellular 45mm

4.7 (50 reviews)

Stay Connected, Active, and Healthy with the Ultimate Smartwatch The Apple Watch Series 9 combines advanced health features, seamless connectivity, and customizable design in a powerful smartwatch. With its cellular capabilities, you can stay connected without your iPhone, while its innovative he...

$529.00*
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

Stay Connected, Active, and Healthy with the Ultimate Smartwatch

The Apple Watch Series 9 combines advanced health features, seamless connectivity, and customizable design in a powerful smartwatch. With its cellular capabilities, you can stay connected without your iPhone, while its innovative health and fitness features help you achieve your wellness goals.

Specifications

  • Model: Apple Watch Series 9 [GPS + Cellular 45mm]
  • Case Material: Silver Aluminum
  • Band: Storm Blue Sport Band M/L (fits 160–210mm wrists)
  • Connectivity: Cellular, Wi-Fi
  • Operating System: Watch OS
  • Special Features: Blood Oxygen, ECG Apps, Always-On Retina Display, Cycle Tracking, Activity Tracker, GPS, Voice Control, Heart Rate Monitor
  • Water Resistance: Swimproof with 50m water resistance

Key Features

WHY APPLE WATCH SERIES 9 — Your essential companion for a healthy life is now even more powerful. The S9 chip enables a superbright display and a magical new way to quickly and easily interact with your Apple Watch without touching the screen. Advanced health, safety, and activity features provide powerful insights and help when you need it. And redesigned apps in watchOS give you more information at a glance.

CARBON NEUTRAL — An aluminum Apple Watch Series 9 paired with the latest Sport Loop is carbon neutral. Learn more about Apple’s commitment to the environment at apple.com/2030.

CELLULAR CONNECTIVITY — Send a text, make a call, and stream music without your iPhone nearby. Use Family Setup to manage Apple Watch for family members who don’t yet have their own iPhone, so everyone can stay connected, active, healthy, and safe.

ADVANCED HEALTH FEATURES — Keep an eye on your blood oxygen. Take an ECG anytime. Get notifications if you have an irregular heart rhythm. See how much time you spent in REM, Core, or Deep sleep with sleep stages. Temperature sensing provides insights into overall wellbeing and cycle tracking. And take note of your state of mind to help build emotional awareness and resilience.

A POWERFUL FITNESS PARTNER — The Workout app gives you a range of ways to train plus advanced metrics for more insights about your workout performance. And Apple Watch comes with three months of Apple Fitness+ free.

INNOVATIVE SAFETY FEATURES — Fall Detection and Crash Detection can connect you with emergency services in the event of a hard fall or a severe car crash. And Emergency SOS lets you call for help with the press of a button.

SIMPLY COMPATIBLE — It works seamlessly with your Apple devices and services. Unlock your Mac automatically. Get approximate distance and directions to your iPhone with Precision Finding on supported iPhone models. Pay and send money with Apple Pay. Apple Watch requires iPhone XS or later with the latest iOS version.

EASILY CUSTOMIZABLE — With watch bands in a range of styles, materials, and colors and fully customizable watch faces, you can change your watch to fit your mood or the moment.

INCREDIBLE DURABILITY — Tougher than tough. It’s crack resistant, IP6X-certified dust resistant, and swimproof with 50m water resistance.

LEGAL DISCLAIMERS — This is a summary of the main product features. See below to learn more.

Specifications

Model
Watch Series 9 Cellular 45mm
Processor
S9 chip
Connectivity
Cellular, Wi-Fi 6E, Bluetooth 5.3
Display Brightness
Superbright
Health Features
Blood Oxygen, ECG, Irregular Heart Rhythm Notifications, Sleep Stages, Temperature Sensing, Cycle Tracking, State of Mind
Safety Features
Fall Detection, Crash Detection, Emergency SOS
Water Resistance
50m (Swimproof)
Dust Resistance
IP6X-certified
Durability
Crack resistant
Compatibility
iPhone XS or later with latest iOS
Environmental Claim
Carbon Neutral (with aluminum and Sport Loop)

Pros & Cons

👍 Pros

  • Powered by the S9 chip, enabling a superbright display and a magical new way to interact without touching the screen.
  • Offers cellular connectivity, allowing you to send texts, make calls, and stream music without your iPhone nearby.
  • Features advanced health monitoring including blood oxygen tracking, ECG capabilities, irregular heart rhythm notifications, and sleep stages analysis.
  • Incorporates innovative safety features like Fall Detection, Crash Detection, and Emergency SOS for quick access to help.
  • Designed to be incredibly durable, featuring crack resistance, IP6X-certified dust resistance, and 50m water resistance for swimproof use.

👎 Cons

  • Requires an iPhone XS or later with the latest iOS version for compatibility, meaning it's not a standalone device for all users.
  • The "magical new way to quickly and easily interact" without touching the screen may have a learning curve for some users.
  • While offering many health features, it's not a medical device and should not replace professional medical advice.
  • The carbon-neutral claim applies specifically to an aluminum Apple Watch Series 9 paired with the latest Sport Loop, not all configurations.
  • Specific battery life in cellular mode for extended periods is not detailed, which is a key factor for continuous connectivity.

Frequently Asked Questions

Yes, the Apple Watch Series 9 requires an iPhone XS or later with the latest iOS version for full compatibility and setup, although cellular models allow some functions independently.
With cellular connectivity, you can send texts, make calls, and stream music without your iPhone nearby, offering greater independence.
The Apple Watch Series 9 includes advanced health features such as blood oxygen monitoring, ECG capabilities, irregular heart rhythm notifications, sleep stages tracking, temperature sensing for cycle tracking, and a feature to take note of your state of mind.
It is incredibly durable, featuring crack resistance, IP6X-certified dust resistance, and 50m water resistance, making it swimproof.
The S9 chip enables a superbright display and introduces a magical new way to quickly and easily interact with your Apple Watch without touching the screen, enhancing user experience and performance.
An aluminum Apple Watch Series 9 paired with the latest Sport Loop is carbon neutral, reflecting Apple's commitment to the environment and its 2030 goals.