Infrared sensor on the front and ultrasonic sensor on the back detect obstacles (2-60 cm). When the monkey is caught or lifted, it says funny phrases and makes sounds. There are 2 play modes: Explore and Catch. It can roll forward and backward, move left and right, and move its head and arms. A total of 3 motors control the upper body and legs. It features 5 illuminated buttons and 1 heart button. The toy plays 3 sung songs and 17 melodies, with volume control. It has a child-safe battery compartment and an automatic shut-off. Demo batteries are included.