Add even more power to your LEGO Power Functions! Use the LEGO Power Functions AAA Battery Box to energize your creations with more power than ever before! Features a control switch on the box. - Features a control switch on the box - Powers 2 XL-Motors or 4 M-Motors at once - Same size as #8878 LEGO Power Functions Rechargeable Battery Box - Requires 6 AAA (1.5V) batteries, not included