The 88000 AAA Battery Box delivers reliable power supply for robotics cars, train models and technical creations. Fully compatible with for legoeds and major building block systems, it serves as the core power module for advanced STEM projects. Universal Compatibility: Seamless integration with for legoeds and mainstream building blocks High-Capacity Power: Supports 6xAA batteries for extended operation Modular Design: Effortless installation in robot/train frameworks Industrial Durability: Fire- ABS passed 1000+ connection tests Model: 88000 Power Module Power Input: 6xAA batteries (not included) Interface: Standard building block connector Dimensions: 6.5x3.2x4cm Color:Grey Material:ABS+PC Engineering Composite Materials Package Contents: 2 * for legoeds Train battery box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.