Features: Friendly Solar powered: Adopting solar technology, no need to replace batteries； strong light energy conversion, low light can be used, suitable for verious light environment. Small size is convenient to carry, easily fit into your pocket or school bag, assistant anywhere. Quiet to operate: noiseless design, perfect for use in quiet environment, allowing for more focused study and exams. 8-digit display: clear and easy-to-read digital display, meet the daily calculation needs, suitable for simple math operations. High sensitivity buttons: quick responses and smooth input enhances the using experience. Specifications: Product name: portable light energy calculator Color: white Model: ZC-001 Power supply: solar power supply Screen: 8-digit digital display Product size:about 48mmx72mmx4mm/1.89x2.83x0.16in Package Includes: 1PC 8-digit Caculator note: Please allow 1-2cm errors due to manual measurement. Pictures may not reflect actual color due to different monitors.