Specifications: Adopt the latest and high-efficient technique of Germany to save electricity. Awarded with the excellent green invironment-friendly product of China Authorised by China quality inspection association. Testing number: Wt056000165 Specifications: 1, save your electricity bills by 20% - 30%! 2, to prolong the lifespan of the electric appiances. 3, easy usage, no need maintenance. Technical parameter: Rated voltage:90v - 250v Rated frequency:50hz - 60hz Suitable for houses, condominiums, apartments, shop lots, restaurants, offices, small factories, etc. No installation necessary, just plug it into any available electric socket. Savings seen instantly. Sleek design. Saving electricity is saving money, is earning money!