HAYLOU RS4 Plus Bluetooth Smart Sports Watch with 1.78" AMOLED Display, 105 Workout Modes, 24/7 Heart Rate Monitoring, IP68 Waterproof Rating, and 10-Day Battery Life - Available in Black, Champagne or Silver
HAYLOU RS4 Plus Bluetooth Smart Sports Watch with AMOLED Display and 105 Activity Modes

The HAYLOU RS4 Plus represents a comprehensive fitness tracking solution designed for active individuals seeking detailed performance metrics. With its 1.78-inch AMOLED display offering 368x448 resolution, this sports watch provides clear visibility of your workout data, heart rate readings, and notifications even in bright lighting conditions. The device connects seamlessly to smartphones via Bluetooth 5.1, compatible with Android 6.0 or iOS 11.0 and above operating systems, ensuring broad device support. Its construction includes multiple sensors for monitoring heart rate, blood oxygen levels (SpO2), and motion, creating a holistic picture of your health and fitness progress throughout the day and during exercise sessions.
Features and Construction

The HAYLOU RS4 Plus combines practical design elements with technological features aimed at enhancing your fitness tracking experience. Its physical dimensions and sensor array work together to provide accurate data while maintaining comfort during extended wear. The watch's construction balances functionality with everyday usability, making it suitable for both dedicated workout sessions and general activity monitoring throughout your daily routine.
Material and Build
The HAYLOU RS4 Plus features a 20mm wide strap that attaches securely to the watch case, contributing to its total weight of 57.6g including both components. This weight distribution helps maintain comfort during prolonged wear, whether you're engaged in intensive exercise or wearing the watch throughout your day. The IP68 waterproof rating indicates substantial protection against water immersion, allowing you to wear the device during swimming sessions or in rainy conditions without concern. The watch operates effectively within a temperature range of 0°C to 45°C, accommodating various environmental conditions you might encounter during outdoor activities or travel.
Size and Practical Fit
Measuring 45.2mm in diameter, 37.2mm in height, and 10.4mm in depth, the HAYLOU RS4 Plus presents a balanced profile on the wrist that provides sufficient display area without becoming cumbersome. These dimensions accommodate the 1.78-inch AMOLED display while maintaining a case size appropriate for most wrist sizes. The 20mm strap width offers stability during vigorous movement, reducing shifting or rotation that could affect sensor contact during heart rate monitoring. The overall proportions and weight distribution make this watch suitable for continuous wear, supporting its 24-hour heart rate monitoring functionality without creating discomfort during sleep or extended daily use.
Uses and Placement

The HAYLOU RS4 Plus serves multiple roles in your fitness routine and daily life, combining specialised workout tracking with general health monitoring capabilities. Its range of functions supports both structured exercise sessions and passive health tracking, providing data that can inform your approach to physical activity and wellness. The watch's design and features accommodate various scenarios, from dedicated gym sessions to everyday wear that monitors your general activity levels.
Event or Professional Use
With 105 distinct workout modes, the HAYLOU RS4 Plus offers tracking for a comprehensive range of physical activities, from common exercises like running and cycling to more specialised disciplines. This variety makes the watch suitable for athletes who engage in multiple sports or those following varied training programmes. The continuous heart rate monitoring function provides valuable data during endurance events or interval training sessions, while the SpO2 sensor can offer insights into oxygen utilisation during high-intensity efforts. The IP68 waterproof rating ensures functionality during swimming training or competitions, and the device's operating temperature range supports use in various climate conditions during outdoor events or competitions.
Everyday Home Use
Beyond structured workouts, the HAYLOU RS4 Plus functions as a daily health companion with its 24-hour heart rate monitoring capability. This continuous tracking can help establish baseline health metrics and identify patterns in your physiological responses throughout ordinary activities. The approximately 10-day battery life with heart rate monitoring enabled reduces charging frequency, supporting consistent data collection without daily maintenance interruptions. The watch's compatibility with the Haylou Fun app allows for regular data syncing and review, helping you track progress toward general activity goals or observe trends in your daily movement patterns and sleep quality when those features are utilised.
Benefits and Buying Value

The HAYLOU RS4 Plus offers practical advantages through its combination of tracking capabilities, battery performance, and durability features. These elements work together to provide consistent functionality that supports your fitness journey without requiring excessive maintenance or compromising on data quality. The watch's design prioritises usability across various scenarios, from intensive training to everyday wear, maximising its utility throughout your daily routine.
Reuse and Low Maintenance
The approximately 10-day battery life with continuous heart rate monitoring enabled represents a practical advantage for users seeking uninterrupted tracking. This extended runtime reduces charging frequency, supporting consistent data collection during multi-day activities or travel situations where charging opportunities may be limited. The IP68 waterproof rating enhances the watch's durability in wet conditions, allowing continued use during swimming, in rain, or when exposed to sweat during intense exercise without compromising functionality. These features contribute to the watch's suitability for continuous wear, supporting its role in providing comprehensive 24-hour health and activity monitoring.
Why Choose This Product
The HAYLOU RS4 Plus combines multiple tracking capabilities in a single device, offering heart rate monitoring, SpO2 measurement, motion detection, and 105 workout modes within one package. This integration eliminates the need for multiple specialised devices while providing comprehensive data across various activities. The 1.78-inch AMOLED display ensures clear visibility of your metrics during exercise, and the Bluetooth 5.1 connectivity facilitates seamless data transfer to your smartphone for analysis and progress tracking. Available in Black, Champagne, or Silver colour options, the watch offers aesthetic variety while maintaining its core functionality, allowing selection based on personal preference without compromising on tracking capabilities.
