[Loud & Clear Sound Amplifier] This personal amplifier speaker comes with 18W original clear and high output which perfect for a group with 200-300 People. [Wireless, no burden] You will get a wireless uhf comfortable headsest microphone(35m/100ft), no need to carry the amplifier just put it on table around you. [Long batery life] This portable microphone and speaker comes with 4400mAh rechargeable lithium battery, gives you up to 12 hrs wireless stable continuous amplification with a single charge; Ideal for personal or commercial use large indoor and outdoor. [Bluetooth pa speaker] Not only an amplifiers but also a bt speaker, you can stream your favorite music from any type of Bluetooth-enabled mobile device, up to 33 feet away; Also support Aux input, TF Card, U Disk more in one..Items from Sheng Xinshun's shop