The Garmin Fenix 5X Sapphire in Slate Gray with a 51mm case is a rugged, multisport GPS smartwatch designed for outdoor enthusiasts. It features a 1.2-inch (30.5 mm) transflective LCD display with a resolution of 240 x 240 pixels, protected by a scratch-resistant sapphire crystal lens.  
Garmin Fenix 5X Sapphire (51mm, Slate Gray) – Key Specs:
•Display: 1.2” color, 240x240 px, sapphire crystal lens
•Materials: Stainless steel bezel & rear case
•Water Resistance: 10 ATM (up to 100m)
•Navigation: GPS + GLONASS, full-color TOPO maps
•Sensors: Barometer, altimeter, compass, wrist-based HR monitor
•Connectivity: Bluetooth, ANT+, Wi-Fi (Sapphire model)
•Battery Life:
•12 days (smartwatch mode)
•20 hours (GPS mode)
•50 hours (UltraTrac mode)
•Storage: 12GB internal memory
•Activity Tracking: Advanced performance metrics, smart notifications