A beautifully detailed infra-red-controlled model of the super-beefy Komatsu D575-A3 SD bulldozer...the world's largest bulldozer! Fully assembled and painted, all this bruiser needs to start dozing those bulls is a belly full of AAA batteries (four are required, sold separately) and one 9v battery for the transmitter (also sold separately). The set includes the highly detailed bulldozer itself (driver figure included!) and a 6-channel, four-stick infra-red transmitter provided in a rather construction equipment-like casing. Six precision built-in motors activate the hydraulic cylinders for dozer blade functions (blade height and tilt angle control) and the caterpillar tracks. The set operates on one of three possible bandwidths: A, B, and C (this set is Band A). Different bandwidths can be operated together. A stunningly realistic model with dynamic action!