Apple Watch Ultra 2 is a high-end smartwatch designed for outdoor adventure and extreme sports enthusiasts by Apple. Here are the main parameters and specifications of this watch:

Appearance and material:

- Case size: 49 mm

- Case material: Made of aviation-grade titanium to ensure lightweight while remaining durable.

- Display: All-weather retina display (LTPO OLED) with a maximum brightness of up to 3000 nits, which can be clearly seen even in strong sunlight.

- Screen protection: Sapphire crystal mirror provides excellent scratch resistance.

Hardware configuration:

- Processor: S9 SiP chip, which is Apple's most powerful watch chip to date,

with more powerful processing power and improved neural network engine, supporting device-side processing of Siri requests and other functions.

- Storage: 64GB

- Wireless Technology:

- Wi-Fi (802.11b/g/n 2.4GHz, 802.11n 5GHz)

- Bluetooth 5.0

- Optional cellular network function, allowing users to use calls, text messages and other online services without iPhone.

- UWB ultra-wideband chip: for more accurate positioning services, but availability varies by region.

Sensors and functions:

- GPS: dual-frequency GPS system, using advanced satellite and signal models and customized positioning algorithms to improve accuracy.

- Heart rate monitoring: optical heart rate sensor, which can continuously monitor heart rate and

provide irregular heartbeat reminder function.

- Blood oxygen detection: measure the user's blood oxygen level through the blood oxygen app,

but this should not be used for medical purposes.

- Ambient light sensor: automatically adjust the screen brightness to adapt to different light conditions.

- Electronic compass: help navigation direction.

- Barometer/altimeter: can record altitude changes, suitable for outdoor activities such as mountaineering.

- Gyroscope: assists in motion tracking and fall detection.

- Temperature sensor: monitors skin temperature changes.

- Water temperature sensor: used to monitor water temperature when diving.

- Siren: emits a loud sound signal in an emergency to facilitate search and rescue.

- Car accident detection: can automatically contact emergency services after detecting a serious impact.

- Fall detection: If the watch senses that the user has fallen and is unresponsive for a period of time,

it will automatically call the emergency contact number.

- Menstrual tracking: Although it cannot be used as a birth control method or health diagnosis,

it can help female users track their menstrual cycles.

Battery life:

- Normal use mode: up to 36 hours.

- Low power mode: up to 72 hours. In this mode, some functions will be limited to save power.

A2749 battery for Apple Watch Ultra 2, 542mAh capacity.

Software and operating system:

- Operating system: runs watchOS 10, providing a redesigned application interface, a new cycling experience,

outdoor exploration features, and new Ultra module dials.

Other features:

- Two-finger mutual tap gesture: a gesture control method that can be operated without touching the screen,

allowing users to perform specific operations by tapping their index finger and thumb twice in succession.

- Carbon Neutral Option: Customers can choose to purchase a carbon neutral version of Apple Watch Ultra 2,

marking a step towards Apple's goal of achieving full operational and product lifecycle carbon neutrality by 2030.

- Water Resistance: Water resistant to 100 meters per ISO 22810:2010 standard and suitable for

recreational scuba diving (with compatible third-party apps) to a maximum depth of 40 meters.