Quantity: 5 PCS /1 Card CR2430 Alkaline button batteriesVoltage: 3VChemistry: Alkaline Compatible with: CR2430Use In: Watch， Clock， Calculator， Laser Pens， Remote controls， Toys， Electronic Consumer products， etcSize: 2.4cm x 2.4cm x 0.2cm - 0.94inch x 0.94inch x 0.08inchPackage Included:5PCS x CR2430 Cell Button Battery