Garmin 51MM D2™ Mach 1 Pro, Aviator Smartwatch with Vented Titanium Bracelet

Features
A built-in LED flashlight offers variable white light intensities, a strobe function and red light for flight deck operations.
Improved battery life touts up to 25 days in smartwatch mode and up to 46 hours in the Fly activity, perfect for the professional pilots who complete their trip over multiple days.
Red Shift Mode changes the entire watch interface to shades of red to help preserve night vision, which provides for potentially clearer sight for demanding night flying conditions.
The ECG app2 allows users to record their heart rhythm and check for signs of atrial fibrillation (AFib). Users can take a 30-second ECG recording and view the results immediately on their smartwatch and, optionally, later in the Garmin Connect™ smartphone app.
When pilots aren't taking to the skies, they can get a better understanding of their fitness levels and track their performance with more than 30 built-in sports apps and advanced training features like hill score and endurance score.

Specifications
Lens Material Sapphire Crystal
Bezel Material Titanium
Case material Fiber-reinforced Polymer with Titanium Rear Cover
QuickFit™ Release Bands Yes, 26mm Included
Strap material Titanium & Silicone
Physical size 51 x 51 x 15 mm

Fits wrists with the following circumference:
Silicone Band: 127-210 mm
Leather Band: 135-225 mm
Titanium Band: 132-215 mm
Weight 126 g (Case Only: 60 g)
Water Rating 10 ATM
Touchscreen
Display Type AMOLED
Display Size 1.4" (35.56 mm) Diameter
Display resolution 454 x 454 pixels
LED Flashlight
Battery life Smartwatch mode: Up to 25 days
Fly activity (GPS + SpO2): Up to 46 hours
All Satellite Systems: Up to 62 Hours
All Satellite Systems with Music: Up to 17 Hours