... ,TF,MPS input 3,several colors to selection:pink,black,red,white,etc. Specifications: Output Power: 20W Frequency Response: 100HZ ... Battery Type: Lithium Battery Size:95x80x35 mmColor: pink ,red,black,white Features:The Rechargeable Voice Amplifier adopts ABS engineering ... Hertz. They also prize a harmonic distortion level under 0.5 percent, the level in which any distortion the amplifier introduces ...