The Sony Ericsson Z500a, released in December 2004, was released through Cingular Wireless and Dobson Cellular. The phone has push-to-talk walkie-talkie functionality, but the handset was released before Cingular had rolled out their Push to Talk service. This is a camera phone that has motion capture that can send short videos through the Multimedia Messaging System. It operates on GSM 850/1800/1900. The Z500a was also marketed with a Star Wars Episode III shell and assorted Star Wars ringtones and backgrounds and a demo game that could be downloaded. Sony Ericsson offered additional Star Wars shells so that fans could choose their favorite characters/scenes.