HAYLOU RS4 Plus Smart Sports Watch: 105 Modes, AMOLED Display & 10-Day Battery

The HAYLOU RS4 Plus is a feature-focused Bluetooth sports watch designed for fitness enthusiasts and everyday health monitoring. It consolidates key tracking functions into a single, wearable device that connects to your smartphone via the Haylou Fun app. Its core appeal lies in the breadth of supported activities—105 workout modes—and the depth of continuous health data it provides, including heart rate, blood oxygen levels, and sleep analysis. With an IP68 waterproof rating and a promised 10-day battery life under typical use, it is built for consistent, all-day wear without constant charging, making it a practical tool for tracking progress across various sports and daily routines.

Features and Construction

This section details the physical build and core technical specifications that define the RS4 Plus's capabilities and user experience.

Material and Build

The watch's construction prioritises durability for active use. It achieves an IP68 ingress protection rating, meaning it is dust-tight and can withstand immersion in water under specified conditions, making it suitable for swimming (excluding high-velocity water sports) and sweaty workouts. The included strap is 20mm wide and is designed to be interchangeable, allowing for personalisation. The total weight, including the strap, is 57.6 grams, contributing to a comfortable fit for all-day and night wear, which is essential for accurate sleep and 24/7 heart rate monitoring.

Size and Practical Fit

The watch case itself is compact, measuring 45.2mm in width, 37.2mm in height, and 10.4mm in depth. These dimensions house a 1.78-inch AMOLED display, which offers vibrant colours and high contrast, beneficial for readability in various lighting conditions, including outdoors. The screen resolution is 368 by 448 pixels, providing sharp detail for watch faces and notification text. The device is designed to operate within an ambient temperature range of 0°C to 45°C, ensuring reliable performance in most climates and conditions.

Uses and Placement

The RS4 Plus serves dual purposes: as a dedicated sports companion and a holistic health monitor for daily life.

Event or Professional Use

For athletic training and specific sports, the watch supports a remarkable 105 pre-defined workout modes. This wide array allows users to track everything from running and cycling to more niche activities, providing mode-specific metrics. The built-in motion sensor, combined with GPS connected from your paired phone (where supported by the app), helps map routes and measure performance. The water resistance makes it viable for swimming, while the robust construction stands up to the demands of gym sessions and outdoor adventures.

Everyday Home Use

Beyond structured exercise, the watch functions as a constant health monitor. Its sensors automatically track heart rate throughout the day and night, estimate blood oxygen saturation (SpO2), and analyse sleep stages—data points increasingly valued for general wellness awareness. Notifications from a connected smartphone can be displayed on the screen, and the long battery life reduces daily maintenance. Its slim profile and choice of colours (Black, Champagne, Silver) allow it to blend with casual or work attire.

Benefits and Buying Value

The value proposition of the RS4 Plus is grounded in its combination of multiple tracking functions, extended usability, and clear display technology.

Reuse and Low Maintenance

A significant practical benefit is the extended battery life. The 230mAh battery is quoted to last approximately 10 days when using 24-hour heart rate monitoring, reducing how often you need to find a charger. The IP68 rating adds to the product's longevity by protecting its internal components from common hazards like sweat, rain, and dust, meaning it can be worn confidently in more situations without risking damage. The simple magnetic charging cable makes powering up straightforward.

Why Choose This Product

The HAYLOU RS4 Plus presents a consolidated package for those seeking detailed activity and health data without a premium price tag. Its standout differentiators are the high-resolution AMOLED display—less common in this segment—for excellent readability, the extensive list of 105 sport modes catering to diverse interests, and the robust IP68 waterproofing. It is a suitable choice for users who want a capable all-rounder from a recognised brand in the smart wearable space, focusing on factual tracking over excessive smartwatch features.