The Roamr Safe Pet Tracker button has a straightforward purpose. It is primarily used to power the device on and off. The tracker pairs with the Roamr app, allowing you to track your pet in real-time.To check the battery status on the tracker, you can push the button once on the device, and the meaning of each flash identifies the battery level. 1 x red flash = below 20% battery 2 x red flashes = 20 - 50% battery3 x red flashes = 50 - 80% battery4 x red flashes = above 80% battery Some Roamr accessories, like the LED Night Collar, have their own buttons for adjusting visibility settings during night walks, but these do not involve the tracking functionality​.