Apple Watch Series 9 45mm (GPS + LTE) Premium Used

Description

The Apple Watch Series 9 (45mm) is a 2023 smartwatch from Apple that offers a larger display, powerful performance, advanced health and fitness tracking, and seamless integration with iPhone. It comes in GPS-only or GPS + Cellular variants and suits users wanting a bigger screen for better readability, notifications, and apps compared to the 41mm model.

Design and Build
• Dimensions: 45mm height × 38mm width × 10.7mm depth.
• Weight:
◦ Aluminum case (GPS): 38.7 grams
◦ Aluminum case (GPS + Cellular): 39.0 grams
◦ Stainless steel case: 51.5 grams
• Case materials: Aluminum (lighter, more affordable) or stainless steel (premium feel).
• Finishes:
◦ Aluminum: Pink, Midnight, Starlight, Silver, (PRODUCT)RED.
◦ Stainless steel: Gold, Silver, Graphite.
• Display protection: Ion-X strengthened glass (aluminum cases) or sapphire crystal (stainless steel cases).
• Back: Ceramic and sapphire crystal.
• Wrist fit: Compatible with bands for 140–245mm wrists.
• Durability: Water-resistant to 50 meters (swim-proof), IP6X dust-resistant.
• Other: Digital Crown with haptic feedback, side button, speaker, and microphone.

Display
• Type: Always-On Retina LTPO OLED.
• Size: Approximately 1.9 inches (larger screen area than the 41mm model).
• Resolution: 396 × 484 pixels (~326 ppi).
• Brightness: Up to 2000 nits (peak) for excellent outdoor visibility; as low as 1 nit.
• Features: Edge-to-edge design, wide color gamut, always-on mode (shows time and complications without raising your wrist), and fast refresh rates for smooth scrolling.

Performance and Storage
• Chip: S9 SiP (System in Package) with 64-bit dual-core processor and 4-core Apple Neural Engine (up to 2x faster machine learning tasks than previous generations).
• Storage: 64 GB.
• Connectivity: Wi-Fi (802.11b/g/n), Bluetooth 5.3, second-generation Ultra Wideband (UWB2) chip for precise finding of devices like iPhone or AirTags, NFC for Apple Pay.
• Cellular models: Support LTE/UMTS (eSIM) for calls, texts, and data without iPhone nearby (model-dependent by region).
• Gestures: Double Tap gesture (pinch index finger and thumb twice) to answer calls, play/pause music, scroll, and more — powered by the neural engine.

Health and Fitness Features
• Sensors:
◦ Third-generation optical heart rate sensor.
◦ Electrical heart sensor (for ECG app, region-dependent).
◦ Blood oxygen sensor (SpO2, availability may vary by region due to past regulatory issues).
◦ Body temperature sensor (for cycle tracking insights; not for medical diagnosis).
◦ High-g accelerometer (up to 250G for crash detection), gyroscope, always-on altimeter, compass, ambient light sensor.
• Key capabilities:
◦ Heart rate monitoring, irregular rhythm notifications, low/high heart rate alerts.
◦ ECG (electrocardiogram) app.
◦ Blood oxygen measurements.
◦ Sleep tracking (including stages and sleep apnea notifications in later watchOS).
◦ Fitness tracking: Activity rings, workouts (running, swimming, cycling, etc.), GPS for outdoor activities, VO2 max, and training load insights via watchOS.
◦ Fall/crash detection, emergency SOS, international emergency calling.
◦ Cycle tracking with temperature sensing.
• Other: Medication reminders, mindfulness app, noise monitoring.

Battery and Charging
• Battery: Built-in rechargeable lithium-ion (approximately 308 mAh).
• Life: Up to 18 hours of normal use; up to 36 hours in Low Power Mode.
• Charging: Fast wireless charging via included Apple Magnetic Fast Charger to USB-C cable (about 80% in 45 minutes, full charge around 1 hour).

Software and Compatibility
• OS: Ships with watchOS 10 (upgradable to the latest available versions, including watchOS 11+ as of 2026; long-term support expected).
• Features via watchOS: Smart Stack widgets, enhanced cycling and hiking maps, on-device Siri (faster processing), keyboard input, and more.
• Requires: iPhone Xs or later with the latest iOS.

Additional Notes
• The 45mm size provides more screen real estate for complications, typing, and viewing details compared to the 41mm model, making it popular for users with larger wrists or those who prefer bigger interfaces.
• Bands for 45mm (or compatible 44/42mm) are widely available in many materials/styles (Sport Band, Milanese Loop, leather, etc.).
• the Series 9 is a previous-generation model (succeeded by Series 10 and later). It remains fully functional and supported but may be available mainly through retailers, refurbished channels, or third-party sellers rather than new from Apple’s main lineup.