8-digit Calculator Made of Bamboo. Solar Power, with Auxiliary Battery (button Cell Included). Automatic Shut-off Mechanism, with Soft Silicon Keys. Presented in an Attractive Kraft Design Box. Materials Such as Bamboo Encourage the Use of Natural Raw Materials, Reducing Pollutant Emissions. It Comes From a Highly Resistant & Versatile Plant with Rapid Growth & Regeneration, Making of It an Excellent Alternative to Traditional Wood. Solar. 8 Digits. Button Battery Included Colours: Natural. Minimum Quantity: 25.