... . Enjoy singing at anywhere and anytimeThe world's first portable karaoke player, with music, video, singing functionsIt is ... interface: USB interface(USB-A-Full-speed) Micro SD card memory card slot, 3.5mm headphone output/input interfaceMusic format: MP3, ... 5V, 500mA-1ADemensions: 140*31*32.3mmNet weight: 190g Mini Karaoke Player Earphone With MP3 MP4 TF Card Reader Digital Album Audio Speaker