Update your Timebirds®

What you will need

  • PC* (Windows 8 or above) or MacOS (v13 or above) with USB port.
  • Timebirds™ Sonic Timer.
  • Supplied Timebirds™ USB-A to USB-C cable

Please note OS 4.20 can only be loaded to Timebirds Sonic.

Update Timebirds™ Sonic

You are all done !

What's new ?

Timebirds™ OS-4.20 (Oct 2023)

  • Updated Sonic OS Updater APP on the App Store.
  • Added a round selection for UP and DN modes.
  • Removed UP rd and dn rd


Timebirds™ OS-4.12 (July 2023)

  • Added 3-second beep countdown before a rest period and before the end of a workout.
  • Menu featuring "Chrono" and "Inter" for stopwatch and interval training modes.
  • New "rEAdy" and "End" screen to mark the start and the end of a workout.
  • Added (-) to rEP ct to decrease count if needed.


Timebirds™ OS-4.11 (Dec 2022)

  • OS Updater now available on macOS. Seach Timebirds Sonic OS updater on the Mac App Store.


Timebirds™ OS-4.11 (May 2022)

  • Added 5 minute timeout for all screens except timers, clock and rep count.
  • Fixed “OS” flashing when viewing OS version.
  • Improved battery power management
  • More accurate battery level feedback.


Timebirds™ OS-4.1 (March 2022)

  • New mode rEP ct to keep track of rounds or reps during AMRAPs.
  • New audio indicators at 3s before a round change.
  • Disabled Alarm Clock mode
  • Improved battery power management.
  • Fixed intermittent slight screen flicker when resetting and restarting stopwatch.
  • Fixed buzzer triggering in stopwatch mode after resetting stopwatch and then continuing to hold the reset stopwatch button.
  • Fixed battery % from sometimes triggering when first turning the device on after a factory reset.


Timebirds™ OS-4.0 (Sept 2021)

  • New intro animation
  • New Intro sound
  • Possibility to enable/disable intro sound
  • Possibility to enable/disable 10s count
  • down to start on every mode
  • New and more intuitive Main Menu and
  • Setting Menu layouts.
  • New Fight Gone Bad direct access mode
  • New Tabata direct access mode
  • New 3s count down beeps before the start of a new round (FGB & Tabata)
  • 4 screen Dimming levels
  • Dual Sonic Sound Management (3 Levels)
  • New Clock calibration at 0.002% accuracy
  • New Battery power level feedback
  • New Charging animation
  • 50% increase screen refresh rate.

Timebirds™ Original

What you will need

  • PC (Windows 8 or above) with USB port.
  • Original Timebirds™ Timer – shipped from March 5th 2021.
  • Supplied Timebirds™ USB to USB-C cable

Please note OS 3.12 or earlier cannot be used with Sonic – please see Sonic tab above

Step 1

Find what USB communication port (COM port) is Timebirds™ Timer connected to

Step 1a


Once you have downloaded the latest Timebirds OS .zip file, right click the file and select 'Extact All'

Step 1b


Right click on the windows START logo and select Device Manager.

Step 1c


  • Click on “Ports (COM & LTP)” to open tab.
  • Look for 'USB-SERIAL CH340'. Note the COM port number in the brackets (COM #?).
  • Close device Manager window.

Can't see your device?

  • Check your firewall settings.
  • You can read more about how to do that here >

Device not automatically recognized by Windows?

Step 2

Download the latest Timebirds OS

Step 2a


Once you have downloaded the latest Timebirds OS .zip file (See requirements tab). Right click the file and select 'Extact All'

Step 2b


Double click Timebirds OS update.exe to open.

Step 2c


Click on ... button to open hex file.


Click on UPDATE

You are all done !

What's new ?

Timebirds™ OS 3.12

  • DN counter pause fix (pressing pause would reset the timer in a count dn timer).


Timebirds™ OS 3.11

  • New volume calibration with 3 levels.


Timebirds™ OS 3.01

  • Memory fix and interval timer rest change (period of rest would count indefinitely if set to 0)


Timebirds™ OS 3.0

  • New clock calibration to increase clock accuracy
  • New battery power management to remove temperature warning.
  • New battery power management to improve battery life
  • New Sound Level screen for direct access to volume settings
  • New screen with Timebirds OS indication
  • Removal of boot screen
  • New Home Screen loading animation
  • New battery charging animation.
  • Overall improvement on software stability.
  • Fix 12hr format clock setting going back to 24hr format
  • Fix colon turning off in stopwatch
  • Increase refresh rate by 50%


Timebirds™ OS 2.0

  • Enables data transfer through the USB-C port
  • Removal of audio temperature waning (visual warning remains)


Timebirds™ OS 1.0

  • Original OS