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why does the hapmton bay 191 707 require a battery
This NSi Industries EW120B digital time switch accepts 120-277 VAC input and its SPDT output contacts can activate a 30 amp load or 2 hp motor. The switch automatically detects the input voltage and does not require manual voltage setting. This timer includes 20 pairs of on/off set points, has a minimum cycle time of one minute, and is suitable for individualized daily operation. A rechargeable super capacitor provides four days of backup power to maintain time and schedule settings. This timer...

509ms