Features: For 4pcs 3A Battery Pack box with Switching with Cord and Lid，not need solding Suitable for electronics enthusiasts building customizable projects, and child safe battery compartments for educational toy With lid and convenient switching: The battery pack transparently lid , allowing you to open the battery holder easily, saving time and energy. Equipped with switching and wire, you can easily control the power flows, convenient for battery powering devices. Built with industrial springs and color coded wiring for instantly polarity recognition, withstands daily wear while maintaining optimaled electrical conductivity for 3A battery configurations. Specifications: Color: Black Size: 62x48x16mm/ 2.44x1.89x0.63in Connection： series connection Power: for 6V Applicable batteries: for 4piece 3A batteries( without battery) Package Includes: 1PC Battery box note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.