Haylou RS4

Reference: 3398

Haylou LS12 RS4 - Haylou's flagship watch for 2022.1.78" Ultra HD display with AMOLED technology, 368 x 448 px resolution, metal body, Bluetooth V5.1 connectivity with Haylou Fun app, Sp02 (blood oxygenation), heart rate and sleep monitoring. Integrated pedometer, motion sensor, breathing exercise, music player, calories burned, alarm clock, stopwatch, weather forecast and phone notifications (sms, calls and apps). 12 sports modes. Dust and water resistant with IP68 certification, battery life up to 25 days (10 days with continuous heart rate monitoring).

Replacement bracelet size of 20mm fits this device.


1238.84 tax excl.

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Haylou, one of the best-known and top manufacturers of low-cost smartwatches, is coming up with the latest addition to its flagship RS lineup for 2022.

The most important features of the Haylou RS4 watch

  • 1.78" UHD AMOLED touchscreen display 
  • 230 mAh battery for up to 25 days of use
  • Large selection of watch faces
  • Heart rate monitoring
  • 12 sports activities
  • Notifications from your phone
  • Waterproof with IP68 certification
  • Android and iOS compatibility

Precision quality and workmanship

The Haylou RS4 smartwatch has a modern and sleek design with a large square display with curved sides. It is a UNISEX model that both men and women will appreciate. In addition to the touchscreen, the device also has a physical button that is used to turn on and off or to control the sports modes.

The thin and light body of the watch and is made of high quality aluminum, thanks to which the watch weighs only 48.6g and therefore will not interfere with your wrist at all.

The package includes a black silicone bracelet that is suitable for all-day wear. Would you prefer a metal or leather strap ? No problem. The watch is equipped with a universal clasp with a width of 20 mm, offering you unlimited possibilities to adapt to your style.

Your personal sports coach

The Haylou RS4 is suitable for any athlete, whether you are just a recreational runner, pushing your own limits or just like to go for a walk, the watch will help you monitor your activities. It will offer you a total of 12 sports modes, which include outdoor running, fast walking, cycling, climbing, spinning, yoga, indoor running, free training, basketball, football or rowing.

What can you track for your activities? Each activity will offer a variety of metrics. The most common ones you'll come across are exercise time, heart rate, distance, average pace, number of steps or number of calories burned. In short, they will be your ideal sports coach that you will always have on hand.

Your personal health advisor

If you're a fan of a healthy lifestyle and want to keep everything under control, then this is the watch for you. For example, you can monitor your blood oxygen level - SpO2. Low blood oxygen levels can easily cause fatigue, lack of energy and reduced concentration. This condition can occur at any time of the day. Athletes and people with intense brain strain are especially at risk.

But they can also help you with all-day heart rate monitoring or smart sleep monitoring, where they will automatically record sleep times and conditions. You'll also get reminders to stand, walk or stretch while you're sedentary or studying, as well as breathing exercises to relieve stress and relax your mind and body.

Battery life you can count on

The Haylou RS4 smart sports watch lasts up to 25 days on a single charge, in basic use mode. But if you're a keen sportsman or use the watch 24 hours a day, day or night, the battery will last you up to 10 days on a single charge.

Durability certification 

The watch is IP68 certified. So you can use it even when washing dishes, showering, etc. It can also cope with excessive sweating or rain.

Smart features and notifications

Haylou RS4 is equipped with Bluetooth V5.1, thanks to which you can playfully connect the watch to your smartphone and immediately start receiving smart notifications in the form of calls, messages and information from various applications directly on your wrist. Simply lift your wrist and you know everything in the first second. It will offer various time functions, weather notifications, music control or locating a lost phone. 

Don't you like the design of the watch face ? Simply change it. You will have more than 80 watch faces to choose from and download in the Haylou Fun app.


Data sheet

1.78" UHD Amoled, 368 x 448 px
Bluetooth V5.1
Other features:
12 sports activities: outdoor running, fast walking, indoor running, cycling, climbing, spinning, yoga, freestyle, gymnastics, basketball, football, rowing
Phone notifications, optical heart rate sensor, accelerometer, pedometer, find phone, stopwatch, music player, sleep monitoring, SPO2, IP68 dust and water resistance.
Operating system:
Compatibility: Android 6.0 and higher / iOS 11 and higher
45.2 x 37.2 x 11.1mm
48,6 g
230 mAh
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