Mini, Portable, Wireless Bluetooth speaker .Bluetooth, TF Card, Radio, 3.5MM Audio connector. Size: 60MM * 50MM . Distortion: ≤10% . Transmission Distance:: 10 meters . Shell: Iron . Use: Computer, Home Theatre, Karaoke Player, Mobile Phone, Portable Audio Player, Stage, Tablet pc and laptopShenzhen Hisent Science&Technology Co.,Ltd