Westek TM104 208 to 277-Volt DPST 40 AMP Hardwire Indoor Mechanical Timer SwitchFormat: Retail Pkg Age: Platform: N A Add a measure of safety, security and convenience to everyday life with Westek Timers, Light Controls and Dimmers. The Westek Heavy Duty Outdoor Mechanical Timer Switch is perfect for a variety of application such as pools, spas, fountains, water heaters, outdoor lighting and signs, plus office and commercial uses.