About Product:Brand: Jiayi brand item No.: 105B model: kk105B material: plastic specification: 13*7.5 * 1CM adapter battery: button battery applicable gift occasions: Awards commemoration, anniversary celebration, advertising promotion, trade fair, wedding, birthday, business gifts printed LOGO: can be processed custom: Yes product type: scientific calculator whether the voice function is supported: no display digit: 10 with battery or not: Yes net weight: 80(g) imported or not: no color: black