12-digit desktop calculator Antibacterial Edition. Treated with silver phosphate glass (CAS 308069-39-8) with antibacterial effect (calculator’s body and keys). Ideal to improve hygiene at school, in the office, in environments in contact with food and sanitary environments. 4 memory keys, square root function, Grand Total function and back key. Power off. Dual power supply: solar energy and 1.5 V battery. 3 assorted colours: white-turquoise, white-pink and white-grey. Size: 11.6 x 16.3 x 3.7cm.