two open chassis sub-miniature motors adjustable light-sensitivity suits almost any light condition and allows to control it's 'bug-like' behavior adjustable speed choose between two different walks LED 'eyes' indicate driving direction Solder and assemble this bug-shaped miniature robot! The microbug is always hungry for light and heads towards it. Attractive bright colored bug-shaped miniature robot. THIS IS AN ELECTRONIC KIT AND REQUIRES ASSEMBLY WITH A SOLDERING IRON. Soldering iron and solder not included. Features: two open-chassis subminiature motors adjustable light sensitivity suits almost any light intensity and makes it possible to control its 'bug-like' behaviour adjustable speed choice of two different walks LED 'eyes' indicate driving direction stops in total darkness Specifications: power supply: 2 x 1.5V AAA batteries (not included) dimensions: 110 x 90mm / 4.3 x 3.5" NOTE: Some batches of MK127/MK129 might contain motors with different polarity indications than the ones mentioned in the manuals. Two types are available: 1) Motors, where the '+' is indicated by a plus-sign in a circle. 2) Motors, with a red mark close to one of the connections. This mark indicates the MINUS of the motor. Future manuals will feature instructions for both types of motors. If you have any doubt, you can check the sense of rotation by applying 1.5..3V to the motor, using the supplied battery connector and observe the sense of rotation.Product Dimensions (L x W x H): 25 x x 200 inchesProduct Weight: 0.099375 LB