"GPD2846A TF Card MP3 Decoder Board Features: - Working Voltage: 3.7V Lithium Battery 600MA or 5V USB Power Supply; - Chip: GPD2846A; - Chip Footprint: S0P16; - PCB Size: 34.23mm*22.33mm*1m; - With 2W Mixed mono; - With Power supply, it can play Automaticly; - With LED indicator; - Supports MP3 format playback; - Supports USB audio mode; - Supports 3 types FM radio chip: RDA5807, BK1080 and RTC6207E; - Does not support infrared remote control; - Does not support USB device mode."