The TORK EWZ101 7-Day Astronomic Digital Timer is designed for 30 amp / 120-277 volt loads and has a plastic enclosure for outdoor use. Automate your home or office to save energy and money using the intuitive programming interface and light sensitive activation to activate lights or signage when the ambient light level drops below a customizable threshold. Features one SPDT output channel with automatic voltage detection and a photo/override switch. Designed for commercial applications including outdoor lighting, motors, security or parking lot lights, and heating or air conditioning equipment.