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This foldable pen lamp produces LED lights that are energy saving which is why batteries will last longer. It can be easily pocketed for its small size. Bring it anywhere with you so can read and have ample lighting when you need to read something.
Item Type: Book LightsIs Batteries Required: YesPower Source: Dry BatteryLight Source: LED BulbsBattery Type: Button Cell (not included)Wattage: 4.5v