The AIBO ERS 210 is an entertainment robot that perceives its environment by means of a camera, touch sensors and microphones. By talking to it or touching its head, chin and back, sensors are activated and the robot dog reacts with a movement. For example, happy feelings are expressed by wiggling its ears or tail. In addition, it can respond to voice commands. It recognizes its own name and simple commands such as "sit" or "lie down." The AIBO ERS 210 was available in black, silver, gold, red, blue, green and white and cost about $1,500 at launch.