I purchased and used this in November of last year, but I've re-contracted for gas, so I'm selling it. It works perfectly. ＜Product Description＞ Keeps water warm and heats water for a warm bath. A powerful 1000W bath heater that can heat water from cold. Useful in emergencies when gas is unavailable. Set it before bed, and you can take a morning bath as soon as you wake up. Set it before you leave for work, and you can take a bath as soon as you get home. 【Keeps Warm】 Automatically detects when the water has cooled and quickly heats it to a comfortable temperature. 【Heats Water】 In summer, it takes 3-4 hours, and in winter, it takes 8-9 hours to heat the water in the bathtub.