The colors may differ slightly from the original.

The colors may differ slightly from the original.

The new EQB-501 Series comes with a new Accurate Time System module, making it the next generation of the EQB-501XDB and EQB-501XD. The Accurate Time System automatically connects to an Internet time server four times a day to ensure accurate Home Time and World Time settings.
These models also employ the same speed indicator as the EQB-500 Series. Linking with an app lets you measure lap times while watching motor sports and display the average speed with the speed indicator dial at 4 o'clock.
These models are parts of the EDIFICE Smartphone Link Series that connects to a phone by Bluetooth® to keep time settings accurate.

  • Main Watch Functions
    • Tough Solar
    • Dual Dial World Time
    • Daily alarm
    • Day indicator
    • Date display
    • 100-meter water resistance
  • Smartphone Link Functions
    • Auto time adjustment (four times a day)
    • Easy watch settings
      Dual Dial World Time (Home city time swapping)
      World time for about 300 cities
      Daily alarm settings
    • Stopwatch data transfer (Lap/Split time display measured in 1/1000 seconds for up to 100 entries)
    • Phone finder

More information

EQB-501 Special site


Operation Guide


  • Black ion plated band
  • Black ion plated case
  • Black IP
  • Mineral Glass
  • Screw Lock Crown
  • Neobrite
  • 100-meter water resistance
  • Case / bezel material: Stainless steel
  • Solid Band
  • One-touch 3-fold Clasp
  • Stainless Steel Band
  • Solar powered
  • Mobile link (Wireless linking using Bluetooth® )
  • Airplane mode
  • Dual time (Home city time swapping)
  • 1-second stopwatch
    Measuring capacity: 23:59'59
    Measuring modes: Elapsed time, split time
    Other: Speed (0 to 300 units/hour)
  • Daily alarm
  • Low battery alert
  • Full auto-calendar (to year 2099)
  • Power Saving (hands stop to save power when the watch is left in the dark)
  • Date display
  • Regular timekeeping
    Analog: 3 hands (hour, minute(hand moves every 10 seconds), second),
    4 dials (24-hour, dual time hour and minute, dual time 24-hour, day)
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Approx. battery operating time:
    8 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    34 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Size of case : 52 X 48.1 X 14.1 mm
  • Total weight : 199 g
  • Package EDIFICE 3
  • Bluetooth<sup>™</sup> logo