This NSi Industries TORK A515MW mechanical timer can handle up to 20 amp resistive loads, 7 amp tungsten lighting loads, or 1 hp motor loads at 125 VAC. This timer features a 15 minute maximum variable time setting and a constant ON setting. The housing fits in a standard electrical box for in-wall mounting, and features a spring-wound twist knob and ivory face. The timer also accepts 250 and 277 VAC input voltages for commercial applications. This mechanical timer is Underwriter Laboratories (UL) Listed for quality assurance and is suitable for use indoors to control lighting and appliances.Time switches (also known as timers) are used to automatically turn electrical devices on or off at preset time intervals during a daily or weekly period. Timers can either be mechanical or electronic. Mechanical timers feature a dial with multiple pins to set the on/off time intervals. Electronic timers feature an LCD display and pushbuttons to set the time intervals. Timer switches have one or more device outlets or circuit contacts, and can be used to control indoor lights, outdoor lights, appliances, and small equipment motors.NSi Industries manufactures electrical components and sensors, lighting products, and energy management products. The company, founded in 1975, is headquartered in Huntersville, NC.