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Haylou RS4 Plus Smartwatch

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The Haylou-Xiaomi sub-brand is back again and brought us a new upgraded version called Haylou RS4 Plus. This wearable is a fitness tracker that has got a square design with a 1.78-inch AMOLED display and is equipped with several features including a Heart rate monitor, SpO2 blood oxygen monitor, 100+ sports modes, IP68 waterproof, and much more. So let’s dive into the full details!


HD Retina Grade AMOLED Display - With 368*448 Pixel's unprecedented visual clarity, the large 1.78-inch screen provides a precise and clear experience anytime, anywhere. The 60Hz refresh rate continues to optimize the user experience, which is rarely for round smartwatches that can be currently available

Magnetic Strap is Comfortable to Wear - It can be quickly taken apart and is comfortable to wear and take off. Suitable for people worried about the belt buckle and hole size mismatch.

100+Online Watch Faces to Suit your style - More than 100+ stylish watch faces, or even upload your photo as the background image for true personalization. (10+ watch faces are available at launch time, and more than 100+ other watch faces will be added gradually by the OTA upgrade.)

100+ Sport Modes - A Trusted Fitness Partner - Haylou RS4 Plus has 105 workout modes. It can record real-time exercise data, helping you track and improve your athletic performance.

Multi UI Main Menu According to Your Style - Haylou RS4 Plus has various kinds of UI operations: a cellular model and 360° unrestrained smooth sliding. Show personality and suit your style.

Smart Sleep Monitoring with Deep Sleep Recording Helper - The percentage of deep sleep is an essential criterion of sleep quality. Haylou RS4 Plus actively monitors sleep time and status to help you develop good sleep habits.

Smart SpO2 Tracking - Sleepiness and fatigue after high-intensity exercise or work are insufficient oxygen in the body. Raise your wrist to test your blood oxygen level and keep your health under control.

Smart 24-hour Heart Rate Monitoring - Haylou RS4 Plus can accurately detect your heart rate 24 hours a day and detect even slight changes, well knowing your every heartbeat.

All-Day Stress Monitoring - The Haylou RS4 Plus can monitor your pressure all day-even while sleeping. The watch is a comprehensive and easy-to-use health partner for everyone.

Female Menstrual Cycle Reminder - The menstrual period and the ovulation period can be recorded and can be more intimate reminders before coming. (*The world premiere version does not have this function. It will be added gradually by the OTA upgrade. Monitoring data and results are for reference only, not as a basis for diagnosis and medical treatment.)

IP68 Dustproof and Waterproof - The watch is IP68 waterproof. There is no need to take off the watch when washing your hands, and you can easily cope with sweating during workouts or stormy rains when you are out.

10-day Battery Life - No Need for Recharging During Workdays - Haylou RS4 Plus packs an existence of super-powerful features in its slim body yet still has enough endurance to last for up to 10 days from a single full charge with typical usage.


SPECIFICATIONS Haylou RS4 Plus Smartwatch

Model name Haylou RS4 Plus
Screen 1.78" AMOLED display
Touch Screen Resolution: 368x448px
230 mAh
Standby time Up to 28 days
Working time Up to 10 days (All-day heart rate monitoring, sleep monitoring, call reminder twice a day, message reminder 100 times a day; wrist-lift to wake screen 150 times a day; exercise three times a week, run for 60 minutes each time; SpO2 tracking twice.)
Waterproof IP68 
(NOT suitable for swimming, bathing or showering)
APP Haylou Fun
Compatibility Android 6.0 or iOS 11.0 and above

Stable Bluetooth 5.1

105 workout modes
Health monitoring:
Heart Rate Monitor, Blood Pressure (Stress levels), Blood Oxygen, Sleep Monitoring
Other features:
Alarm, customizable watch face, call notifications, message notifications, calendar notifications, app notifications, weather forecast, Do not disturb mode, battery level display, different ways to wear, OTA updates


Watch strap Type: Removable watch strap
Material: Magnetic strap (silicone material)
Width: 20mm

Material: Craft with metal
Weight: 57.6g (with strap)
Product measurements: 45.2*37.2*10.4mm

Package contents

1 x Haylou RS4 Plus Smartwatch
1 x Charging cable
1 x User manual