Automatic: Turns lamps and devices On/Off up to 6 programmed times per day. Random Programming Function: Randomly turns On/Off within 2-30 minutes of your programmed settings, for additional security while you are away from home. Built-in Rechargeable Battery: Saves programmed settings in the event of a power failure. Security: Simulates home occupancy to deter intruders. Works with compact fluorescent or incandescent bulbs.