The Amazfit T-Rex 3 Onyx is built like a tank but smart as hell. With a 1.5″ AMOLED display that hits 2,000 nits of peak brightness, it stays readable in the brightest sun or deepest snow. The rugged 316L stainless steel bezel and polymer body shrug off heat, cold, drops, and deep water — it's even certified for freediving up to 45 m.

You’ll get up to 27 days of battery on a single charge, plus GPS that keeps going for up to 180 hours in max mode. Whether you’re trail running, open-water swimming, or navigating offline maps with dual-band GPS, the T-Rex 3 keeps up. And with 170+ sport modes, AI voice control, and a full suite of pro-level health sensors, it’s got the brains to match the brawn.

Adventure-ready, wrist-friendly, and seriously hard to beat.

What’s in the Box

• Amazfit T-Rex 3 smartwatch – Onyx
• Charging cable and adapter
• Quick start guide

• Ultra-Bright AMOLED Display: 1.5″ screen with 480×480 px resolution and 2,000 nits brightness — includes Glove Mode for cold-weather use.
• Adventure-Proof Build: 316L stainless steel bezel, Gorilla Glass screen, –30 °C to 70 °C resistance, 10 ATM water resistance — certified for freediving up to 45 m.
• Epic Battery Life: Up to 27 days of use; GPS modes offer up to 180 hours depending on settings.
• Pro-Level GPS: Dual-band, 6-satellite GPS with offline map support for remote trails and real-time positioning.
• Full Sensor Suite: Heart rate, SpO₂, barometric altimeter, compass, gyroscope, and more — all powered by Zepp OS.

• Display: 1.5″ AMOLED, 480 × 480 px, 2,000 nits peak brightness
• Case Dimensions: 48.5 × 48.5 × 13.75 mm
• Weight: 68.3 g (without strap)
• Materials: 316L stainless steel bezel, polymer alloy body, Corning Gorilla Glass
• Strap: 22 mm liquid silicone, fits wrists 145–210 mm
• Battery: 700 mAh — up to 27 days typical, 13 days heavy use
• GPS Battery Modes: Standard ~42 h, Extended ~114 h, Max Battery ~180 h
• Water Resistance: 10 ATM (100 m); certified for freediving (EN13319, ISO6425, GB/T 18828)
• Sensors: Heart rate, SpO₂, barometric altimeter, compass, accelerometer, gyroscope, ambient light
• GPS: Dual-band with 6-satellite systems, offline maps
• Software Features: 170+ sports modes, Zepp OS, AI voice assistant
• Connectivity: Bluetooth 5.2, Wi‑Fi