I had bought these electronic timer for a Aquaruim as controller for the lighting start of the year. To adjust short study the manual is already difficult, a huge piece of paper, very small typefaces and confusing. Older people could thus have their Porbleme. The clock did its work, and at first everything worked also very well. Now after 7 months makes part of what it wants ... The time moved from alone, the set times are just gone. Have everything set again several times, but that holds then just as a few days. Returning also no longer works, warranty has already expired. Externally presenting a branded what no longer holds the expectations after a short time! Inside a gaanz cheap part, I once screwed ... safe Made in China or Made in PRC For me, the thing now heads into the bin. I can not recommend this product !!!