Amazfit T-Rex Ultra 2 / Apple Watch Series 7 (45 mm, GPS)

Amazfit T-Rex Ultra 2: A2550 · 51 mm · Black Magma · silicone strap

Apple Watch Series 7 (45 mm, GPS): Apple Watch Series 7, 45 mm aluminium case, GPS model. The 41 mm case, GPS + Cellular, stainless steel and titanium versions are separate configurations with different display area and weight.

Specification	Amazfit T-Rex Ultra 2	Apple Watch Series 7 (45 mm, GPS)
Release year	2026	2021
Announcement / availability	19 February 2026 Amazfit	—
Display	1.5-inch AMOLED · 480 × 480 · sapphire glass Amazfit	Always-On Retina LTPO OLED; 396 × 484 pixels; 1,143 mm² display area; 1,000 nits brightness The 41 mm case has 352 × 430 pixels and 904 mm² of display area. The LTPO panel lowers its refresh rate when the wrist is down so the screen can stay on. Apple
Peak brightness	Up to 3000 nits With auto brightness; unavailable in low-temperature mode or below 30% battery. Amazfit	—
Body	Polymer case; Grade 5 titanium bezel, buttons and back Amazfit	—
Size / weight	51 × 51 × 14.3 mm; 89.2 g with strap Thickness excludes heart-rate sensor base. Amazfit	—
Strap	26 mm silicone; 145–215 mm wrist Amazfit	—
Storage	64 GB total; up to 26.7 GB user space Amazfit	32 GB Apple
Positioning	Dual-band GNSS; six satellite systems Amazfit	—
Sensors	BioTracker 6.0 PPG; barometer, compass, motion and temperature sensors Amazfit	—
Battery	870 mAh; up to 30 typical / 15 heavy / 10 AOD days Separate manufacturer scenarios, not continuous GPS endurance. Amazfit	—
GPS battery modes	Up to 50 Accurate / 90 saving / 177 max-battery hours Amazfit	—
Wireless	Bluetooth 5.2 BLE; 2.4 GHz Wi-Fi Amazfit	—
Water / diving	10 ATM; recreational diving up to 45 m Not for technical, cave or mixed-gas diving. Amazfit	—
Phone connection	Android 7+ / iOS 15+; Zepp app Amazfit	—
Charging	Magnetic charging puck; USB-C cable separate Amazfit	—
Calls	Bluetooth calls using microphone/speaker Amazfit	—
Chip	—	S7 SiP with 64-bit dual-core processor; W3 wireless chip; U1 (Ultra Wideband) Ultra Wideband availability varies by region. Apple
Health sensors	—	Blood oxygen sensor (Blood Oxygen app); electrical heart sensor (ECG app); third-generation optical heart sensor Blood oxygen readings are not for medical use. The ECG app and irregular rhythm notification need the latest watchOS/iOS and are not intended for people under 22. Apple
Motion and safety	—	Accelerometer up to 32 g-forces with fall detection; gyroscope; ambient light sensor; Emergency SOS On the GPS model, Emergency SOS needs the iPhone nearby or a known Wi-Fi network with Wi-Fi Calling; international emergency calling is only on the GPS + Cellular model. Apple
Location	—	GPS, GLONASS, Galileo, QZSS and BeiDou; compass; always-on altimeter Apple
Connectivity	—	Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.0 LTE/UMTS is only on GPS + Cellular models. Apple
Battery and charging	—	Up to 18 hours; built-in lithium-ion battery; USB-C magnetic fast charging cable Apple’s battery test was done in August 2021 with preproduction watches paired to an iPhone; actual life varies with use and settings. The fast-charge test used the A2515 cable and a 20 W USB-C adapter; the adapter is not in the box. Apple
Durability	—	Water resistant to 50 metres under ISO 22810:2010; IP6X dust resistant; ceramic and sapphire crystal back Suitable for shallow-water activities such as swimming in a pool or the sea; not for scuba diving, waterskiing or high-velocity water. Apple
Size and weight	—	45 × 38 × 10.7 mm; aluminium: 38.8 g The 45 mm stainless steel case weighs 51.5 g and titanium 45.1 g. Apple
Compatibility	—	Requires iPhone 6s or later with the latest iOS Per Apple’s launch documentation; some features are unavailable when the watch is set up through Family Setup. Apple
Colours	—	Aluminium: Midnight, Starlight, Green, Blue, (PRODUCT)RED Apple