【Newest Wireless Voice Amplifier】This is the upgraded bluetooth voice amplifier with magnetic wireless lavalier microphone. The microphone end magnetic suction is hidden on the back of the voice amplifier box, which can store and charge the 2pcs included microphones together. The wireless clip on microphones can be easily clipped to collar or tie, eliminating the discomfort associated with traditional headset microphones, makes you more comfortable during teaching or speeches.【Powerful & Clear Sound】 The wireless voice amplifier megaphone adopts the premium 76mm large-sized horn and with a built-in DSP intelligent noise-reduction chip, it effectively filters out ambient noise, delivering loud, original and clear sound. The sound coverage range of the wireless megaphone speaker is about 10,000 sq ft (1000 m),allowing up to 100 students to hear you clearly and protect your throat.【Rechargeable Large Capacity Battery】Our portable wireless voice amplifier has a built-in 2600mAh rechargeable battery that can provide 17 hours amplifying time or 10 hours music playing time with a full charge. It only takes 3-4 hours to fully charge, and with a battery level display on the screen.【Lightweight & Portable】This wireless microphone and megaphone speaker is in compact size and super lightweight only 0.5 lbs (228g), very easy and convenient to carry. There is a back buckle on the voice amplifier, and comes with an adjustable strap so you can wear it comfortably around your waist, slicg it over your shoulder or hang it around your neck for your need【Wide Applications】Our Bluetooth voice amplifier mini megaphone speaker also supports U disk, easily connect to your cell phone,tablet or computer via Bluetooth to provide you high-definition audio experience. Perfect portable wireless voice amplifier with lapel microphone for teaching, training, coacher, tour guide, shopping mall, meeting, speech, outdoor singing and so on