1. Functions: "New game" (big button) and "End game" (small button).
2. Functions: "New game" (big button) and "cleaning statistics "(small button).
A small red diode will tell you that the button has been pressed. The weight is just 22 grams and the dimensions are comparable to a small keychain (57 x 37 mm). The range is from 1 to 2 metres. One CR2032 battery gives up to 3 months of great performance.