[Voice Amplifier with Wireless Lavalier Microphone]: The wireless voice amplifier come with wireless lavalier microphone. Upgrade wireless microphone design helps you messy wire and feeling of and discomfort from tradition wired microphone headset. You can just clip microphone on your shirt to convenient for your teaching, training, presention, public speaking and other activies. [Surprisingly Loud Volume]: The wireless lavalier microphone amplifier system is , compact and portable. The amplifier has a built-in speaker with a noise-canceling chip and a stable signal, which makes sound louder, clearer, and more balanced. The wireless microphone with speaker is perfect for classroom teaching, public speaking, interviews and more. [Long Battery Life]: The wireless bluetooth speaker system built-in 2600 mAh rechargeable battery that can used for up to 6 hours, It to be fully within 3 hours. The portable lapel microphone working time is up to 6 hours. Only needs 1.5 hours to fully charge it. [Easy to Operate]: The wireless mic auto connect with voice amplifier when power on, stable mission distance up to 65 Feet (20m). You can immerse yourself in a relaxed teaching environment with our wireless voice amplifier. How to connect microphone and speakers? Take microphone out from back of speaker, and hold button on side of microphone for 2-3 seconds, and then turn on speaker, the microphone connect to speaker automatically. When connection is successful, the microphone indicator is green and always on, and "Connect" on speaker display also be always on.<br><br>How to improve sound quality? 1. Place microphone within 6 inches of your mouth for clearer, smoother sound. If distance is too far (such as when you turn or tilt your head), the audio may be interrupted or malfunction. 2. Small adjustments to microphone position and speaker distance can make a , so test distance for optimal use well in advance. 3. Make sure mi