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2 pack - LS555H Handheld Foldable Pocket Calculator 8-Digit LCD - Foldable for ultra compactness. Large 16 mm digit display size for easy readability. Adjustable display angle for different levels of ambient light. Solar and battery-powered for use in any lighting condition. Power Source(s): Battery Solar Display Notation: Numeric Number of Display Digits: 8 Memory: 4-Key.