... ,TF,MPS input 3,several colors to selection:pink,black,red,white,etc. Specifications: Output Power: 20W Frequency Response: 100HZ ~ ... battery Battery Type: Lithium Battery Size:95x80x35 mmColor: pink ,red,black,white Features:The Rechargeable Voice Amplifier adopts ABS engineering ... make use of an exterior alternating current, or AC power source, collecting the power from an ordinary wall outlet and ...