* Super Wide Compatibility: this portable pa speaker system is designed with multifunctions. You can play the music through the USB port; AUX input (e.g. mp3, CD player);or Stream the music from your any bluetooth-enabled devices like smartphone,Tablet and more. Let you can move around freely during the activities.However, please note this wireless pa speaker can not compatible with the devices those without searching bluetooth function (Such as bluetooth headset / earphones). * All-In-One bluetooth Sound System: this product is a multifunciton device Karaoke Machine, Music Speaker, PA System, Guitar Ampilifire and so on. * Long using time: Built in 2400mAh rechargeable batteries that provide power of 4 to 8 hours.(the batteries usually depend on the volume of sound) * Superior Sound Quality: Portable speaker and microphone system with super power output. It provides superb sound for audiences of up to 150 people.Perfect for public gathering, outdoors, wedding, meeting, backyard parties and more. * What You Will Get: 30 days return and refund without any reason and 12-Month warranty and Lifetime technical support, No questions asked.If you have any problems please feel free to contact us first, we will try our best to solve it to you