9V battery box for use with 6 x AAA batteries (AA batteries not included) to connect motors, LED lights and other accessories. Compatible with 1st generation Power Functions and battery boxes from Buzzwiz, CaDA, Mould King, GoBricks and more. Recommended age: 9 years and over Compatible with the market leader's clamp building blocks Technical features:The AAA battery box powers 2 xl motors or 4 m motors at the same time. Requires 6 AAA 1.5 V batteries (not included) Compatible with 1st generation Power Functions and battery boxes from Buzzwiz, CaDA, Mould King, GoBrick Who is Mould King Mould King and LEGO are two competitors in the toy market, both offering clamping bricks.