The ST01K self adjusting wall switch timer allows you to set it once and forget it. Never bother with resetting again. Use with decorator style wall plate (sold separately). Perfect for retrofits and remodels, the ST01K does not require a neutral wire, while controlling LED, CFL and Incandescent lighting. This timer utilizes an astronomic feature to keep track of daily sunrise/sunset changes and automatic daylight saving time adjustment. For use with single pole or 3-way applications, allowing you to control multiple lights with one timer. The large LCD display provides an easy readout of time of day, mode and load status. The random feature can vary the time your lights turn on by a few minutes to give your home a "lived in" look. Also features battery backup and manual override. CSA certified. Resistive: 15A, 120/277VAC. Tungsten: 15A, 120 VAC, 6A, 208/277 VAC. Ballast: 8A, 120 VAC, 4A, 208/277 VAC. Motor: 1 HP, 120 VAC, 2 HP, 240 VAC. DC Loads: 4A, 12 VDS, 2A, 28 VDS. Controls LED and CFL lights 24-hour or 7-day digital timer with up to 20 ON/OFF events Astronomic feature, random feature, auto daylight saving time adjustment No neutral wire - perfect for retrofits and remodel projects For single and 3-way applications