The TORK EWZ201C 7-Day Astronomic Digital Timer is designed for 120-277 volt loads and has a Noryl plastic enclosure with a locking hasp for outdoor use. Automate your home or office to save energy and money using the intuitive programming interface and light sensitive activation to turn on lights or signage when the ambient light level drops below a customizable threshold. Use the software interface to choose between 2 variable SPST channels or 1 DPST channel. Designed for commercial applications including outdoor lighting, motors, security or parking lot lights, and heating or air conditioning equipment.