AMOLED display – 1.78″ rectangular design – 368 x 448 pixel resolution – 24/7 heart rate monitor – Oxygen saturation measurement (SpO2) – Sleep tracking – 12 sport modes – Up to 12 days typical daily use – Haylou APP – IP68 Water resistance

1.78-inch AMOLED HD display

You’ll see how easy it is to navigate and consult information on the Haylou RS4’s large rectangular screen, which has a diagonal of 1.78 inches. It is made of high-quality AMOLED material, with a fine and delicate texture, and features a high resolution of 368 x 448 pixels.

Comfortable and lightweight metal design with silicone strap

Made especially for sports, the Haylou RS4 provides totally comfortable wearability. For starters, the metal bezel features an exquisite aesthetic, as well as a lightweight and thin design weighing just 48.6 grams.

Blood oxygen level measurement (SpO2)

Fatigued after a high-intensity activity? This may be a sign of insufficient blood oxygen. Raise your wrist and check your SpO2 level with the Haylou RS4 and keep your health under control.

Dynamic heart rate monitoring

There’s no doubt about it: it’s time to start taking better care of yourself. The Haylou RS4 monitors your heart rate in real time throughout the day, giving you super-accurate data in easy-to-read graphs.

Recording your sleep quality and hours of sleep

The quality of your sleep is also very important, which is why the Haylou RS4 records your sleep hours, comprehensively detecting and analyzing the phases of sleep and their duration. Follow the personalized advice to help you develop good habits.

Activity tracking with 12 training options

Get off the couch! Haylou RS4 measures your sports activity, motivates you and helps you reach your goals through a super accurate motion sensor and 12 training modes, counting your steps, calculating burned calories, measuring your heart rate/active zone in real time, and more.

Included sport modes are: outdoor running, indoor running, fast walking, outdoor cycling, stationary cycling, mountain biking, mountaineering, rowing, yoga, gym, football, basketball and free training.

230mAh battery and up to 12 days of typical daily use

And with a 230mAh battery, the Haylou RS4 will always be ready to accompany you on your travels and track your progress without having to carry a charger everywhere you go. To be more precise, this Haylou watch provides a battery life of up to 12 days* with typical daily use, and up to 20 days* with basic use.

Sync data and receive alerts via Bluetooth

Get more out of your Haylou RS4! Pair it to your phone via Bluetooth to receive incoming calls, messages or notifications, and even control music playback or find your phone when you think you’ve lost it. You can also sync your health and fitness data via the Haylou app and see detailed graphs of your progress.

IP68 water resistance and other practical features

Another advantage of the Haylou RS4 is that you can wash your hands while wearing it or run in the rain without fear of damaging it, as the IP68* certification protects it against water and dust, so nothing will put your outdoor plans at risk!

Technical specifications Haylou RS4 Black / Black Strap:

• General parameters
  • Brand: Haylou
  • Product: Smartwatch
  • Model: RS4
• Screen
  • Size: 1.78” (rectangular)
  • Type: AMOLED
  • Resolution: 368 x 448 p
  • Touch control: Yes
• Technical parameters
  • Connection: Bluetooth 5.1
  • Compatible devices: Android 6.0 or higher, iOS 11.0 or higher
  • Application: Haylou APP
• Sensors
  • Heart rate sensor
  • SpO2 sensor
  • Motion sensor
• Additional functions
  • Alerts of incoming calls and notifications (via Bluetooth)
  • Remote music control (via Bluetooth)
  • Health monitoring (24/7 heart rate sensor, SpO2 level, sleep analysis)
  • Daily activity tracking with 12 sports modes (counts calories, steps, distance, etc.)
  • Weather forecast
  • Wake-up / Alarm
  • Timer
  • Stopwatch
  • Find phone
  • Breathing exercises
  • Warning of sedentary lifestyle
• Battery
  • Capacity: 230 mAh
  • Battery life (typical daily use): up to 12 days
  • Battery life (basic use): up to 20 days
  • Charging method: Magnetic
• Physical parameters
  • Strap: Silicone (replaceable, 20mm)
  • Degree of waterproofing: IP68
  • Dimensions: 45.2 x 37.2 x 11.1 mm
  • Weight (with strap): 48.6 g
• Package content
  • 1 x Haylou RS4 Black / Black Strap
  • 1 x Charging cable
  • 1 x User Manual