Feature:<br /><br />1. Input Voltage DC 12V<br />2. Frequency response:20Hz-20kHz<br />Output power: RMS 20W_20W 1 KHz<br />Harmonic distortion :< 0.05% 4W 1 KHz<br />SNR: 85db<br />High control:12db±10KHz<br />Bass control:12db±100Hz<br />The signal level: 220MV 47K<br />3. Reader-disk format:MP3 FM<br />4. FM frequency rang:87.5MHz-108.0MHz<br /><br />Packing list:<br /><br />1*Amplifier    <br />1*comtroller   <br />1*Instructions<br /><img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_3.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_4.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_5.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_6.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_7.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_8.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_9.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_10.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_11.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/152/455/558455152/img/agdetail.image-gmkt.com/152/455/558455152/img/img6.eachbuyer.com/x9/p100/eb01332_12.jpg" />