... USB,TF,MPS input 3,several colors to selection:pink,black,red,white,etc. Specifications: Output Power: 20W Frequency ... Type: Lithium Battery Size:95x80x35 mmColor: pink ,red,black,white Features:The Rechargeable Voice Amplifier adopts ABS engineering plastic ... precisely replicates the original sound wave pattern it receives from a playback device. The best amplifiers perform to exacting specifications ...