TRANSDUCER 3inch 10w*1 AMPLIFIER class D power amplifier S/N >85dB DISTORTION <0.5% FREQUENCY RESPONSE 150HZ-18KGZ DC input 5V/1000mah Impedance 4ohms Rated Output Power 10Watts*1 Battery built-in polymer Battery with 1200mah Warranty: -All Item are in good condition,will be test and pack well before ship out. -The products damaged due to logistics will not covered by warranty. -We offer 7-day warranty upon the arrival date of unit. Warranty doesnt cover the accessories and freebies, only the unit is provided. Attention: When leaving a FEEDBACK: -Let us know your concern by contacting us before rating the received items. Give us a chance to make things right. When CANCELLING an order: -Be sure to leave a message on chatbox stating the reason on cancellation. If no messages on chatbox, your cancellation will be rejected automatically.