Changing the battery
Remove the orange rubber ring from the iTrex. Carefully insert the enclosed tool into the small slot located on the left side of the device. Using the tool, remove the battery tray.
Remove the old battery and place the new battery into the tray with the + side facing up. Slide the battery tray back into the unit and reattach the orange rubber ring to the iTrex.
Included rubber rings
There are two rubber rings included in the box. One is used to attach to the included wire loop for key rings, luggage, bags, etc. and one without the triangular hole. The ring without the triangular hole is paired with the included adhesive pads for attaching to your computer, phone, bike, etc.
To attach the iTrex to a surface, remove the backing from the adhesive pad and stick the pad to the back of your iTrex unit. Next,remove the side of the pad to expose the adhesive, allowing you to stick it to your desired surface.
To attach the iTrex to a ring, bag, pet, etcetera, put the orange ring with the triangular hold onto your iTrex. The enclosed wire can be attached through the triangular hole. The wire has a built-in screw on each end that created a loop. No additional tools are needed.
How to pair the iTrex with your app
Customizing your iTrex icon