Product description 24 Hour Heavy Duty Plug-in Mechanical Timer can be easily used indoor only as kitchen timer, garden timer and more. Automates fans, lamps, lights, sprinklers, seasonal/ decorative/ holiday & Christmas lighting, illumination, heat, A/C, and other electronic appliances. The light timer can control up to 48 groups of ON/OFF switch. Several timing combinations can be set such as hourly, daily, weekly and group of the weeks. Settings Automatically Repeat Every 24 Hours Specifications: Length: 4.7 inches Width: 2.75 inches Height: 3 inches Weight: 8 ounces Rated Voltage: 125VAC, 15A, 60 Hz, 1/2HP, 1725W Always on schedule, always be cool Automate lights to turn on and off, morning and night Automate AC, heater or fans to turn on before arriving home Automate coffee maker to start before you get up Automate battery chargers to avoid over-charging; extends the life of the battery Small Red Led light is Output Indicator Programming Example: Assume it is 08:05 AM, and you want to set timer on between 8:30AM ~ 9:45AM 1. Set Current Time Rotate the dial CLOCKWISE until the arrow aligns to 08:05 AM 2. Set Timer to be ""ON"" Push down all the pins between 8:30AM & 9:45AM Note: Please Double Check AM/PM. Black Part is for 12AM ~ 12PM; White Part is for 12PM ~ 12AM Each Pin Represents 15 minutes If you plug the timer between 8:20 AM and 10:40 AM, it will not turn on the appliance right away so as to avoid power surge