Descripition: Product size: 57 x 31.5 x 12.8mm Color available: red, blue, white Can be only Led, or with the buckle Power supply: 1pc CR2032 button battery Battery life: for factory standard quality can use about 20 hours Available with 96 different characters can choose from Can store 6 messages.1 can store 512 characters; 2-6 can store 256 characters With 9 levels Speed and Lum Can be operated through 3 buttons by hand LED: 21x 7 dot matrix