Haylou RS4 Max smart watch

  • 1.91-inch HD display
  • Bluetooth calls
  • IP68 waterproof
  • 127 sports modes, precise motion algorithms
  • Waterproof speaker, high fidelity sound quality
  • 270mAh high-capacity battery
  • Magnetic silicon strap
  • Comprehensive health management


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Features & Compatibility

Technical Specification of Haylou RS4 Max Calling Smartwatch


  •  Body Material: Metal
  • Size:  48.3*39*11.4mm (mm)
  • Weight: 61.3g ( including strap)
  • Button: 1 side button
  • Strap Type: Magnetic silicon
  • Watch strap size: 22mm
  • Water-resistance Grade: IP68
  • Color: Midnight blue/Star silver


  • Display Type: TFT HD display
  • Display Shape: Square
  • Display Size:  1.91’’
  • Display Resolution: 320*380 Pixel
  • Cloud-based watch faces: Yes


  • Battery Capacity:  270 mAh
  • Battery Life: In daily usage mode, the battery life can reach up to 9 days, and the standby time can reach up to 25 days.
  • Charging: Up to 2 hours
  • Charging type: Magnetic

Sensors & Connection

  • Sensor: Heart rate sensor, motion sensor, blood oxygen sensor
  • Connection : Bluetooth: v5.3
  • System requirements: Android 6.0 and above, iOS9.0 and above
  • Application: Haylou Fun
  • Language:

     English (default), Chinese, Traditional Chinese, Czech, German, Spanish, Arabic, Hindi, Indonesian, Italian, Thai, Polish, Portuguese, Russian, Vietnamese, Turkish, French.

    Sports modes:

    125+ sports modes: Outdoor walking, Race walking, Outdoor running, Marathon, Outdoor cycling, Unicycle, Hiking, BMX, Trail running, Roller skating, Trekking, Rock climbing, Surfing, Kayaking, Hunting, etc.

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