MP3 Hardware Decoder w/ Remote Controller/USB/Mini USB/SD Slot - Silver (3.7V)
Color: Silver - Built-in MP3 decoder module - Supports USB flash drive up to 4GB - Supports SD/MMC card up to 8GB - Supports MP3 files - With memory function - Working voltage: 3.7V - Great for musical toys DIY project - Comes with remote controller (1 x CR1220 battery included)