Start button

Start button

The start button will let you beat your rivals right from the start by measuring and helping to improve your reaction time. xTimer guarantees precision of 2/100th of a second for reaction time measurements.


Pro tip: choose different colors when ordering more than one receiver. This way devices will be easier to identify because every color is assigned to a particular device in the xTimer app later. Please let us know the color you want while placing an order or we will send you a random color.



      • Battery type - CR2032 (replaceable, non-rechargeable)
      • Battery life - up to 300 starts

      Weight and size:

      • 8cm x 8cm x 0.8cm
      • 70 grams (including battery)

      30-day money back guarantee

      We care about your satisfaction - if you’re not completely satisfied with your xTimer, simply send it back within 30 days and we’ll return 100% of your money - no questions asked!


      We offer flat rate express shipping for all of our products to the most of the countries. 

      However, we do not cover any additional customs tax that your country might have. We ship from Latvia (EU). If you are uncertain about your country tax code, please contact us before placing an order. Our products are shipped using the following carriers: UPS Express or Fedex Express.

    150,00 €Price