... selection:pink,black,red,white,etc. Specifications: Output Power: 20W Frequency Response: 100HZ ~ 13,000 HZ + 1db Consumption Current ... : pink ,red,black,white Features:The Rechargeable Voice Amplifier adopts ABS engineering plastic, impact resistance Tone clear Applicable ... 20,000 Hertz. They also prize a harmonic distortion level under 0.5 percent, the level in which any distortion the amplifier ...