... :5-8rpm, 4. Power by one 1.5V/AA battery. 5. Ideal for promotion the new products such as mobile phones, mp4 ... , 6. Widely used in the retail stores, supermarkets, exhibitions and for other advertising purposes etc. Unit pack :by Foam,opp,bubble ... used in:the retail stores, supermarkets, multiple shop, exhibitions and for other advertising purposes etc more pictures: