Haylou RS4 Max Calling Smartwatch

Vivid & User-Friendly Display

Haylou RS4 Max has a 1.91-inch HD screen, nearly 8% larger than that of RS4 Plus, offers a superior screen-to-body ratio, and delivers an unparalleled visual experience.

Seamless Bluetooth Calls

Haylou RS4 Max is equipped with the latest Bluetooth 5.3 chip. This watch ensures stable connectivity for hassle-free call-making and receiving.

Smart Off-Wrist Security

The clever off-wrist lock feature automatically detects when you're not wearing it and secures the screen, ensuring your privacy is always protected.

Ultimate Wearing Comfort

Experience unparalleled comfort with the Haylou RS4 Max's magnetic loop, designed for effortless wearability. Its built-in magnet ensures a perfect fit every time, adapting seamlessly to your wrist.

Exquisite Metallic Bezel

Discover the Haylou RS4 Max's sleek all-metal frame and brilliantly polished bezel for a refined, high-quality appearance.

Custom Watch Faces

Sporty, techy, minimalist, or fun cartoon - pick your style. Transform your photo album or opt for dynamic watch faces. Just lift your wrist and stand out from the crowd.

127 Workout Modes

Choose from 127 workout modes tailored to your favorite activities. The Haylou RS4 Max smartwatch provides scientific guidance, precise workout tracking, and more.

Reliable Health Tracking

Get accurate health data through the newly added liveness detection and blood oxygen tracking functions.

Detailed Sleep Monitoring

Gain comprehensive insights into your sleep patterns with the Haylou RS4 Max. It offers detailed sleep monitoring, giving you a complete picture of your sleep quality, including stages and duration.

Monitor different stages of sleep

Deep sleep, light sleep, awake stages, REM, and sporadic naps.

Female health management

The Haylou RS4 Max smartwatch includes a thoughtful feature for female health management. It allows users to record and accurately predict menstrual cycles, providing valuable insights for better understanding and managing one's health.

Standout Water Resistance

The Haylou RS4 Max boasts an IP68 water resistance rating, providing peace of mind for your daily activities. Whether breaking a sweat during workouts or being caught in a downpour, your watch is up to the challenge.