Built in dusk to dawn sensor will turn on any device when it becomes dark. Ideal whilst away, abroad or just out for the night. Built in Winter/Summer Switch, Manually switch to adjust the on cycle times Winter: 4 hours. -Summer: 2 Hours. Following the above the timer will automatically select at random one of the below settings 1. Turn on one to three times randomly during the night for approximately 1 hour. 2. Turn on every hour during the night for approximately 30 minutes. 3. Turn on every hour during the night for approximately 15 minutes. Maximum Wattage: 1200w