Flexible silicone calculator Soft rolling Dual power(solar power and button cell battery) Product size: 154*98*8MM 8 Digits display Soft rolling Dual power(solar power and button cell battery) Flexible calculator, pocket size; *Dual power, solar and battery; *8 digits, ideal for bigger calculate; *Water $ dust proof *Flexible calculator, pocket size; *Dual power, solar and battery; *8 digits, ideal for bigger calculate; *Water $ dust proof.