The Cybiko is a handheld computer from Russia that was introduced in the United States by David Yang's company Cybiko Inc. in New York to test it in retail in April 2000. It was released in the rest of the United States in May 2000. It was designed to appeal to teenagers by being able to send text messages two ways using radio. Over 430 "official" freeware games and applications were released for the Cybiko. Because it can be used to send text messages, it has a QWERTY keyboard that is used with a stylus. An MP3 player add-on and a SmartMedia card reader were made for the Cybiko. The company stopped manufacturing the Cybiko after two product versions and a few years. Multiple Cybikos can communicate with each other from up to 300 metres (0.19 miles) away. Several Cybikos can be used for chatting with each other in a wireless chatroom. Over 500,000 Cybiko Classics were sold by the end of 2000.