The Sony TC-WR775 is a portable CD/MP3 player released by Sony in 2003. It supports both CD-Audio and MP3 music formats, making it a versatile player for users who prefer listening to both types of audio. Some of its features include:1. 2.0-inch QVGA (320 x 240) color LCD display with backlight, allowing users to easily view track information and navigate through their library.2. Direct CD Play for quick CD operation, as well as digital audio output (16-bit, 44.1 kHz) for higher sound quality.3. Up to 12 hours of battery life, depending on the audio source, so users can enjoy their music for a long time without needing to recharge.4. 16 MB internal memory and support for Secure Digital (SD) and MultiMediaCard (MMC) cards, making it easy to expand the player's storage capacity.5. Additional features such as playlist creation, repeat/shuffle modes, and a sleep timer for conserving battery life during extended play sessions.Overall, the Sony TC-WR775 is a reliable and convenient portable audio player that combines the best of both CD and MP3 playback capabilities.