1, Music or sound comes out automatically when bottle cap touches metal part of the beer opener; voice can be customized which is usually from 7 to 30seconds. 2, High precision mould, fine finish, with upper and lower case closed seamlessly. 3, Plastic color selectable 4, Plain area for logo printing, sever as a good electronic gifts for advertising, sales promotion. 5, Power supply: AG13*3(included and replaceable). 6, Battery playing time for 10seconds music is more than 1000times, which is much longer than other types in the market. 7, Unit size: 13*4.4*1.8CM.