Key Features:Hi-Fi INSIDE MAGNETIC TRUMPET: More louder clear and soft sound; Loop play back function,keep playing your favorite song EFFECTIVE AND LOUD: The loudspeaker or public address system uses double voice coil design, provides a high output of up to 10 W, offers deep bass, while consuming little power.ERGONOMIC DESIGN: Patent appearance, comfortable, portable, elegant and generousMULTI-PURPOSE: This incredible PA equipment can also work as a speaker for computer, iPad mobile or phone. The system also supports TF card, USB flash drive and auxiliary cable inputRECHARGEABLE AND LONG USING TIME: Built-in 1800mAh Lithium rechargeable battery.Amplify time up to 8-12 hours after a full chargeManufacturer Specifications General Product Specification:Color:BlackPeak power output: 10 wattsFrequency response: 90Hz-18KHzOutput impedance: 4ΩWork temperature: -10 degree to 45 degreeCharging voltage: DC 5V 500mAAmplify time: 8 to 12 hoursMusic-play time: 6 to 10 hoursCharging time: 3 to 5 hou