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  • Haylou RS4 Plus
  • Haylou RS4 Plus
  • Haylou RS4 Plus
  • Haylou RS4 Plus
Haylou RS4 PlusHaylou RS4 PlusHaylou RS4 PlusHaylou RS4 Plus

Haylou RS4 Plus

  • Category: Haylou
  • 1.78” AMOLED HD display
  • 60HZ refresh rate, smooth and delicate picture quality
  • Support 105 workout modes
  • Support multi-UI main menu mode
  • Product description:Haylou RS4 Plus Support all-day heart rate and blood oxygen monitoring
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Haylou RS4 Plus

1.78″ Retina AMOLED display│368 x 448 pixels│Craft with Metal│105 Sports mode│ 100+ Online Watch Faces│SpO₂ Heart rate, Sleep and Pressure Monitoring

The specifications


1.78 inch Retina AMOLED Display, 368 x 448 pixels, 60HZ refresh rate.


SpO₂ Heart rate, Sleep and Pressure Monitoring



Bluetooth 5.1
Battery life

About 10 days (Turn on heart rate monitoring for 24 hours)* Battery life may vary depending on usage, settings, operating conditions, and other factors, so actual results may differ from data on the device. From laboratory.

Download APP

APP Name: Haylou Fun

Smartphone Compatible: Android 6.0 or iOS 11.0 and above


System language: English, Portuguese, German, Italian, Spanish, Japanese.

Sport modes

105 sport modes


Case: plastic

Bezel: Alloy

Stainless steel button: stainless steel

Stainless steel buckle: stainless steel


Material: Durable and comfortable silicone.

The Size

Dial size: 45.2×37.2×10.4mm Weight: 57.6g with bracelet.


Operating temperature: 0° to 45°C. Temperatures below 0°C may affect battery life and performance.

Box packaging

Smart Watch (including standard strap), Magnetic Charging Base, Package, Instruction Manual.