About KOSPET Tank T4

The KOSPET Tank T4 is a rugged, flagship smartwatch that brings high-end outdoor navigation and military-grade durability to a classic round-dial format. Released alongside the rectangular M4 in late 2025, it is engineered for athletes and adventurers who require a "tool-watch" aesthetic without sacrificing modern smart features.

Unlike many competitors that rely on reinforced plastics, the Tank T4 features an Inox 360 stainless steel unibody and case back. This "Inox Shield" construction is SGS-certified to meet 20 U.S. MIL-STD-810H standards, ensuring resistance to extreme shocks, vibrations, and temperatures ranging from -50°C to 70°C. The watch is protected by Corning Gorilla Glass 3 and holds a 10 ATM and IP69K rating, making it suitable for high-pressure water jets and diving up to 45 meters.

The T4 sports a circular 1.43-inch AMOLED display with a 466 × 466 resolution (461 PPI). A key advantage for outdoor use is its 1,000-nit peak brightness and an integrated ambient light sensor that automatically adjusts visibility. For navigation, it utilizes Dual-Band Six-System GNSS, supporting GPS, Galileo, GLONASS, BeiDou, QZSS, and NavIC. It also supports offline maps, route imports (GPX/KML), and a "TrackBack" feature for phone-free exploration.

Equipped with a VC9213-4PD optical sensor, the T4 provides 24/7 monitoring for heart rate, SpO₂, stress, and sleep stages (including REM). It supports over 180 sports modes, including specialized diving metrics (Scuba, Freediving, Gauge) and smart recognition for six common activities. Connectivity is handled via Bluetooth 5.3, enabling high-quality calling and music storage (32GB ROM). A unique walkie-talkie function allows for PTT communication within a 40-meter radius during group treks.

The 500mAh pure cobalt battery offers specialized endurance:

Typical Use: 14–15 days

Heavy Use: 9–10 days

Continuous GPS: 21–22 hours

Always-On Display (AOD): 5–6 days