Digital Timer and Book Light?
If you have just purchased your LED light, check in the battery compartment to remove the plastic strip that is possibly still there. Pull on the top portion of the light to turn it on. You can press the small button beneath the digital timer display to set the timer for 15, 30, 45 or 60 minutes. The light will turn off when the timer runs out, or when you press the top of the light down.