Glovion Eco-friendly Finely Handcrafted 12 Digits Solar Powered Nature Bamboo Wood Calculator (Bend Style) Handmade and crafted from responsibly sourced bamboo with a warm and natural texture Solar powered - No batteries required 12 Digits 18 full sized large buttons . (same size as a computer keyboard keys) Size: approx 160 x 92 x 30mm Makes a great gift for any businessperson, Looks good at home or the office