9 Compelling Reasons to Consider
1.91" Colorful HD display
Vivid color and expansive view
Safe off-wrist lock
Safeguard your privacy
Detailed sleep monitoring
Enhance sleep quality
Online/customized watch faces
Over 100 stylish watch faces
All-day health management
127 workout modes
Scientific and efficient workout
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.
* Based on results from Haylou's internal lab tests. Actual usage may vary depending on settings, operation, and environmental factors.
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.
RS4 Series Overview
Find the Perfect RS4 for You
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.
Easy to slip on
Breathable and supple
Versatile multi-color options
Vibrant and trendy
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.
*The test data and results are for reference only, not for diagnosis and treatment.
Continuous heart rate monitoring
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.
* Monitoring data and results are for reference only and are not for diagnosis and treatment.
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.
Keep tabs on mental states.
Relax the body and mind.
Standout Water Resistance
The Haylou RS4 Max boasts an IP68 waterproof 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.
* Designed for daily waterproof needs, suitable for workouts, rainy days, and hand washing. Not suitable for swimming, showering, saunas, surfing, or high-speed water activities. The warranty does not cover damage caused by improper liquid exposure.
Robust Battery Life
Low power consumption system provides 9 days of battery life on a full charge and 14 days in extended battery life mode.
HAYLOU RS4 Max
Haylou RS4 Max smartwatch x1
Charging cable x1
User manual x 1
Haylou RS4 Max
-10 - 45°C
Midnight Blue, Starlight Silver
9 days (24/7 heart rate monitoring)
1.91-inch LCD display
Synced data platform
Android 6.0 and above, iOS 9.0 and above
* The above parameters are measured manually, and a 3-5mm difference is normal.