Why Buy this Wireless Microphone Voice Amplifier Instead of other?? Please note that the Bluetooth function is for the voice amplifier part not for the microfonos inalambricos , the mic part is UHF which is pair via UHF signal! 1. This latest outdoor portable microphone headset with speaker comes with Bluetooth and IPX5 Waterproof function which makes it very special and more practical, as you can not only use it to play music from your mobile phone through bluetooth but also can use it in most outdoor activities without worrying about the rain drop; 2. It comes with 18Watt loud power, amplifys your voice and saves your throat. The sound is clear, crisp, no noise and no distortion. The max 18 watt sound can cover about 20000 sq.ft (2000㎡ ), loud enough to cover a big room; in this regards, we highly recommend you to use this powerful pa system speaker to any outdoor activities.(small indoor places are not recommended); 3. Rechargeable Bluetooth voice amplifier Extremely suitable for teacher classroom, fitness instructor, lectures, parkinson's, kindergarten, tour guides, coaches, promotion use, presentation etc... 4. Professional portable pa system with wireless microphone system, almost no howling under correct operation. Attentions! 1. Please do not put the voice amplifier with headset microphone too close( >40-50cm ) otherwise it will have a sharp noise. 2. Before using, please turn down the volume and then adjust the volume according your need. 3. Do no point the cordless microphone toward the speaker. Read more Bluetooth Wireless Pa Speaker Not only a portable wireless amplifier but also a BT Speaker, help you to amplify voice and enjoy the music! Voice speaker With Recording Funciton Recording special moment, favorite songs or class record with this amplifier speaker Dustproof & Waterproof Voice Amplifier A very good device for outdoor activities, waterproof & dustproof with it's rugged design~ 4000Mah rechargeable battery is very durable. Read more Read more Microphone with Speaker Set Portable Pa System Wireless Voice Amplifier Wired Voice Amplifier Portable Microphone Amplifier Microphone Wired Wireless Wireless Wired Wired Watts 8 Watts 25 Watts 25 Watts 18 Watts 15 Watts