This timer's integrated twilight sensor makes it ideal for year-round use! Whenever the sensor detects that it is dark enough, it automatically turns your lights and other devices on. When daylight returns in the morning, it turns them off again. The combined timer is ideal for lights, pond pumps, dehumidifiers, etc. It has a hinged lid to protect it against moisture which makes it perfectly suited to outdoor use. The timer also features 9 switching programmes, a countdown function and a random setting.