This is an alarm clock that wakes you up gradually with increasing level of light, plus sounds if you choose (birds, chimes, or radio) gradually increasing in volume. It works great, especially if you have trouble waking up early in the dark of winter. I bought it a few years ago & used it successfully through the dark months. I don’t seem to need it anymore. Its discontinued, and I was surprised to see how much people are charging (I paid ~$90, several years ago). Asking $30. Instruction manual still available online.