Features Supports 3.0V Alkaline or Rechargeable Batteries Built-in On/Off Switch for Convenient Switching Sliding Cover for Better Protection Description This is a 3.0V battery holder with a built-in On/Off switch. You can use two AA-size batteries (each with 1.5V). Both Alkaline and Rechargeable batteries can be used. Note Batteries are not included Specifications Material: Plastic Battery Holder Demensions: 69.0mm x 34.5mm x 21mm Parts List 1 x (2 x AA Battery Holder with On/Off Switch and Sliding Cover)