HAYLOU RS4 Plus Smart Bluetooth Sports Watch with 1.78-inch AMOLED Display, IP68 Waterproof Rating, 105 Workout Modes, and 10-Day Battery Life for Heart Rate, Sleep, and SpO2 Monitoring
HAYLOU RS4 Plus Smart Bluetooth Sports Watch with AMOLED Display and IP68 Waterproof Rating

The HAYLOU RS4 Plus is a feature-rich smartwatch designed for fitness enthusiasts and those seeking detailed health monitoring. Its 1.78-inch AMOLED display offers a crisp, vibrant interface for navigating 105 workout modes, checking notifications, and reviewing health metrics like heart rate and blood oxygen levels. With an IP68 waterproof rating, it withstands immersion, making it suitable for swimming and training in all conditions. The watch supports continuous 24-hour health tracking and connects seamlessly to smartphones via Bluetooth 5.1, syncing data to the Haylou Fun app. Weighing 57.6g with the strap, it provides a balanced feel on the wrist during extended wear.
Features and Construction

The RS4 Plus combines a detailed display with robust sensors in a compact design built for daily activity and exercise tracking.
Material and Build
The watch includes a dial, strap, and charging cable, though specific materials are not detailed. Its construction supports an IP68 waterproof rating, indicating resistance to dust and water immersion up to a certain depth and duration. This makes it practical for use during swimming, running in the rain, or intense workouts where sweat and moisture are present. The device is designed to operate within a temperature range of 0°C to 45°C, ensuring functionality in various environments.
Size and Practical Fit
With dimensions of 45.2mm by 37.2mm and a thickness of 10.4mm, the watch has a moderate footprint on the wrist. The strap width is 20mm, providing a secure fit that accommodates different wrist sizes. At 57.6g including the strap, it offers a lightweight feel suitable for all-day wear without causing discomfort. This balance of size and weight makes it unobtrusive during sleep monitoring or extended workout sessions.
Uses and Placement

This smartwatch serves multiple roles, from a dedicated fitness companion to a general health monitor for everyday awareness.
Event or Professional Use
With 105 built-in workout modes, the watch caters to a wide spectrum of athletic activities, from running and cycling to more specialised exercises. The continuous heart rate and SpO2 sensors provide real-time data that can inform training intensity and recovery. The IP68 rating allows it to be worn during swimming sessions, tracking laps and stroke count. For professionals or serious athletes, the data synced to the Haylou Fun app can help analyse performance trends over time.
Everyday Home Use
Beyond workouts, the watch functions as a daily health tracker, monitoring sleep patterns and providing insights into overall wellbeing. The AMOLED display clearly shows notifications, time, and health metrics at a glance. Its approximately 10-day battery life with heart rate monitoring enabled reduces charging frequency, supporting consistent use. The watch's compatibility with Android and iOS devices makes it accessible for most smartphone users to integrate into their routine.
Benefits and Buying Value

The RS4 Plus offers practical advantages through its combination of extensive tracking, durable design, and long battery life.
Reuse and Low Maintenance
The watch is built for repeated use across various activities and conditions due to its IP68 waterproof rating and robust sensor array. The long battery life minimises downtime for charging, supporting continuous wear. General care, such as avoiding extreme temperatures outside the 0°C to 45°C range, helps maintain its functionality over time. Its design supports daily wear without requiring specialised maintenance routines.
Why Choose This Product
The HAYLOU RS4 Plus stands out for its detailed AMOLED display, comprehensive 105 workout modes, and integrated health sensors including SpO2 monitoring. The IP68 rating adds versatility for water-based activities. The approximately 10-day battery life offers convenience for users who prefer less frequent charging. Available in Black, Champagne, or Silver, it provides aesthetic options to match personal style while delivering focused fitness and health tracking capabilities.
