Thank you for viewing. This is the iRobot NorthStar Navigation Cube. It was included with the purchase of a vacuum cleaner and was only used a few times. I am selling it because I don't have much opportunity to use the cube. I have confirmed that it blinks and lights up when batteries are inserted and the power is turned on (batteries not included at the time of listing). I have not confirmed its operation with the Roomba itself, so please understand this before purchasing. Model Name: NorthStar Navigation Cube Brand Name: iRobot Color: Black No pets, no smoking.