A. Powerful Voice Amplifier: Stable performance, with microphone headset and waistband, clear sound. Amplifies your voice and saves your throat when you have a difficult time speaking loudly enough. B. Features: Mini speaker, The connection is stable enough, built in FM receiver, and a wide range of enhanced signal reception, clearer sound, low noise, support TF card and U disk, Bluetooth connection to play, intelligent anti howling, automatically identify mp3, mp4, Wav and other audio, change songs up and down, fast forward and rewind, memory playback. C. Rechargeable: Personal voice amplifier with LED screen display is rechargeable. Working time is up to 22 hours, charging time 3 hours. 2200 mAh battery capacity, long standby time. D. Convenient: The mini Bluetooth voice amplifier is suitable for most occasions, an adjustable belt for hanging by the shoulder or waist, equipped with a metal buckle. E. Application: This megaphone speaker is very suitable for teachers, tour guides, promoters, fitness and yoga instructors, etc. A big speaking to 50 more members in your group. F. Size Chart: 8.4cmx9.2cmx2.8cm/3.31inchx3.62inchx1.10inch G. Package Includes: 1 Portable Voice Amplifier, 1 Microphone Headset, 1 Waistband, 1 Charging Cable H. Note: Please allow slightly errors due to manual measurement and different monitors.