Note: the newest product appearance logo has changed(Delete The English Logo)!do not effect the apply!Product Dimensions 6.7 x 3.2 x 0.8 inchesItem Weight 8 ouncesShipping Weight 8 ounces (View shipping rates and policies)1. Unique elegant design，Large display，12 digitals，Multilayer bamboo staggered split， durable2. Full bamboo construction，Warm natural texture，Laser engraving marking， never wear3. Automatic Shutdown after 12 minutes no operation to entering power saving mode4. Produced using sustainably grown materials，environmental friendly.5. Solar power supply， will never be without electricity，no batteries requiredBamboo Spirit: This century's green and environmental protection， we pursue love nature bring us pure and fresh and natural. And bamboo historically represents is integrity and unyielding， tenacious and persistent， give a person with spirit of bamboo. Bamboo historically represents is integrity and unyielding， tenacious and persistent， give a person with spirit of bamboo.Due to the special properties of the bamboo can relieve people's visual fatigue， and to extend the service life of the keyboard electronic components， is superior to the use of plastic now keyboard， is beneficial to people's physical and mental health.Bamboo qualitative keyboard/mouse good appearance， natural and pure and fresh， rich sense of return to nature， the warm in winter and cool in summer， absorb sweat and absorb ultraviolet light， texture features non-slip， pure and fresh and fragrant smell of nature was deeply loved by people with enthusiasm. Bamboo products of the organic integration of cultural， artistic and personalized make it has the good collection value characteristic， for Asia civilization and have significant influence on world civilization. Overview This product is 18 keys bamboo calculator. Using both solar panels and button battery， double intelligent power supply(generally using solar power， when solar battery have no electricity， use button batteries instead). Full bamboo carbonized natural color. Automatic Shutdown after 12 minutes no operation to entering power saving mode. Application: Used for daily add， subtract， multiply and divide backspace function. Solar cell Operating voltage: 1.5V Working current: 4 uA Care instruction: Please rup the LCD screen and solar panels with soft dry cloth， store in dry and cool place when it idle. It is forbidden to place the product in water or sun exposure.