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#4 most popular in Dual Power Supply CalculatorsMaterial
Plastic
Power Source
Solar+Battery
Style
Scientific
Place of Origin
Guangdong, China
Applicable Battery Type
Dual Power Supply
Model Number
OS-991ES PLUS
417 Functions: This scientific calculator offers a wide range of 417 functions, making it suitable for various complex calculations and educational needs.
Dual Power Supply: The dual power supply, including both button cell and solar, ensures reliable operation in different environments and reduces the risk of sudden power loss.
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