POWERFUL Microphone and Speaker: The portable voice amplifier comes with a WIRELESS headset microphone. UHF wireless transmission technology, 15m/50ft stable wireless connection at open area. The uhf wireless voice amplifier gives you complete freedom to walk around the room. Super 18W output, Sound covers 10000 sq.ft (1000 ), Allows you to project your voice across a group of 20 to 65 people clearly and loudly. Ideal for MEDIUM-SIZED or SMALL room use. RECHARGEABLE Headset Speaker: The personal voice amplifier lasts a long time (8-12 hours); but wireless headset microphone lasts only 2-4 hours. f you need to use the item for a long time, we suggest you choose the wired version. Or you can buy an extra wired microphone or a 3.5mm lapel mic to go with it. ALL-IN-ONE Voice Amplifier, Bluetooth Pa Speaker, Karaoke Microphone: 1. You can easy stream the music from your Bluetooth-enabled devices like Phone, Tablet via Bluetooth and Non-Bluetooth device via Aux input. 2. The Bluetooth