This is AAA to AA Battery Conversion Box Switcher， with it， you can use AAA battery as AA battery， both convenient and functional， it is a necessity in our family. Good choice for you!                                    Features            Made of environmental material<br>Small size， easy to carry<br>Fine workmanship， standby specification， AA battery can replace AAA battery to use<br>Both convenient and functional<br>Large strength and strong toughness<br>There is battery limit slot， can be fixed the battery in a good place<br>Color: White<br>Dimensions: (5 x 1.8)cm / 1.96" x 0.70" (H x Dia)<br>                                                                                                Package Includes            1 x AAA to AA Battery Conversion Box Switcher<br>