Thanks for your visiting this portable voice amplifier megaphone. This simple design has very low noise， close to the theoretical minimum. It is will meet your expectations. Beautiful in small bodily form and easy to carry make it a wonderful aid for various activities， effective avoiding of interference while being used outdoors powered by either rechargeable battery or external power. All in all， it is time to try this portable voice amplifier megaphone.                                    Features                New ang high quality<br>    This speaker system is good for use at the car， motorcycle， etc<br>    Good workmanship， portable and light weight<br>    Loud sound and clear tone quality<br>    No magnetic field， tapes and credit cards are safe<br>    More sound， less energy<br>    Built-in crossover<br>    Easy installtion<br>    Work for iPod， CD player， MP3 / MP4 / MP5 player， etc<br>                                                            Specifications                        Voltage     2.8V    <br>          Maximum Power     500W    <br>          Actual power     30W    <br>          SNR     97db    <br>          Color     Balck    <br>          Dimension     3.4 x 3.4 x 2.0cm / 1.34" x 1.34" x 0.79" (L x W x H)    <br>          Weight     43g / 1.52oz    <br>                                                             Package Includes                1 x Car Dome Tweeter Black<br>                                                            Extra Info            NULL