OnePlus Watch 4 is a Wear OS smartwatch with a titanium alloy case, a sapphire crystal display, Google Gemini, dual-band GPS and up to 16 days of battery life.

The OnePlus Watch 4 is built around a titanium alloy case with rivet detailing, in two finishes: Midnight Titanium with a fluororubber strap and Evergreen Titanium with a mixed fluororubber strap. The case measures 47.4 x 47.4 x 11.0 mm, the watch weighs about 43 g without the strap and about 68 g with it, and the strap fits wrists from 140 to 210 mm.

That makes it 13% lighter and 6% thinner than the OnePlus Watch 3, so it stays comfortable through a long day, a workout and a night of sleep tracking. The round LTPO OLED display has a resolution of 466 x 466 pixels at 310 PPI, sits under sapphire crystal, and reaches 1500 nits in strong sunlight and a 3000-nit peak in OnePlus sports modes outdoors.

The watch is tested to MIL-STD-810H in 16 conditions, including high and low temperature, temperature shock, rain, salt spray, sand and dust, vibration and freezing rain. It is rated 5ATM, IP68 and IP69, so it suits swimming and sweaty workouts and has passed high-temperature, high-pressure water jet testing, and the touchscreen keeps working with wet hands.

Inside, a dual-engine design pairs the Snapdragon W5 with the BES2800 chip, backed by 2 GB of RAM and 32 GB of storage. Together they run Wear OS 6 smoothly while stretching battery life further.

Say "Hey Google" to reach Google Gemini from your wrist: send a quick message, handle tasks across apps, get answers and recall details while your phone stays in your pocket. Google Wallet over NFC covers contactless payments, and Wi-Fi at 2.4 GHz and 5 GHz keeps the watch connected near a known network.

The 646 mAh battery lasts up to 5 days in smart mode, about 3 days with heavy use and up to 16 days in power saver mode. A full charge on the charging base takes about 75 minutes at up to 7.5 W.

The 60s Wellness Overview combines live readings such as heart rate and blood oxygen with trends such as wrist temperature and sleep, and shows up to nine indicators across heart health, sleep and mental wellbeing in one minute. Day to day, the watch tracks heart rate with high and low alerts, all-day blood oxygen, sleep quality, wrist temperature and cycles, and Fall Detection is included among its emergency features.

There are more than 100 sports modes, including professional modes for running, skiing, tennis, badminton, indoor swimming, jump rope, hiking, walking, cycling, elliptical and rowing, with data such as pace, stride, swing speed and strokes. Six activities start automatically, and dual-band L1 and L5 GPS across GPS, Galileo, GLONASS, BeiDou and QZSS records your routes on runs and rides.

OnePlus Watch 4 Key Features:

• Titanium alloy case - a titanium alloy case with rivet detailing, 47.4 x 47.4 x 11.0 mm, and a body of about 43 g without the strap.
• Sapphire crystal LTPO OLED display - 466 x 466 pixels at 310 PPI, up to 1500 nits in strong sunlight and a 3000-nit peak in OnePlus sports modes outdoors.
• Snapdragon W5 and BES2800 - two chips work together for smooth performance and longer battery life.
• Wear OS 6 with Google Gemini - say "Hey Google" to send messages, complete tasks across apps and get answers from your wrist.
• Up to 16 days of battery - up to 5 days in smart mode, about 3 days with heavy use and up to 16 days in power saver mode from the 646 mAh battery.
• 5ATM, IP68 and IP69 - rated for swimming, tested against high-temperature, high-pressure water jets, with touch control that works with wet hands.
• MIL-STD-810H tested - 16 tests including temperature shock, salt spray, sand and dust, vibration and freezing rain.
• 60s Wellness Overview - up to nine indicators across heart health, sleep and mental wellbeing in one quick check.
• Full-time health tracking - heart rate with high and low alerts, all-day blood oxygen, sleep quality, wrist temperature and cycle tracking.
• 100+ sports modes - 11 professional modes with detailed data, and automatic detection for running, walking, cycling, swimming, rowing and elliptical.
• Dual-band GPS - L1 and L5 across GPS, Galileo, GLONASS, BeiDou and QZSS for tracking runs and rides.
• Fall Detection and Google Wallet - Fall Detection among the emergency features, and contactless payments over NFC.

Specifications: