The 88000 AAA Battery Box provides a reliable power supply for robotics cars, train models, and technical creations. Compatible with major building block systems, it serves as a core power module for advanced STEM projects.Universal Compatibility: Seamlessly integrates with major building block brands High-Capacity Power: Supports 6xAA batteries for extended operation Modular Design: Easy installation in robot and train frameworks Industrial Durability: Fire-resistant ABS construction; tested for over 1000 connection cycles Model: 88000 Power Module Power Input: 6xAA batteries (not included) Interface: Standard building block connector Dimensions: 6.5 x 3.2 x 4 cm Color: Grey Material: ABS+PC engineering composite materials Package Contents: 2 x Train battery box Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.