There are dual power supplies, solar energy and battery power supply for this calculator, which is environmentally friendly and saves energy. It is small, light and easy to carry and store.A 12-bit calculator with flexible keys and simple operation can meet your daily calculation needs. It calculates accurately, and it has a clear screen for easy reading.It is constructed of plastic material.The length of this product is 15cm and width is 12cm.It is suitable for home, study, school, classroom, office, dormitory and so on.Item Name: CalculatorMaterial: PlasticFeatures: Accurate, Portable, Easy to OperatePower Supply: Solar Energy/AA Battery (Not Included)Battery: 50mASize Details:L: 15cm/5.91", W: 12cm/4.72" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Calculator