Laploma Retro 2 Personal Wireless Microphone Headset with Speaker Rechargeable Mini PA System for Teachers, Singing, Fitness Instructors, Classroom, Tour Guides, Outdoors etc. This portable mini voice amplifier is compact in size, but sound output is loud enough to cover a room with a small or large group of 25-100 people. Save your throat and make yourself clearly heard. Rechargeable voice amplifier built-in a 1800mAh big lithium battery provides 8 to 12 hours amplify time and 6 to 8 hours music time with a full charge. A small and compact personal voice amplifier that will project voice across the room. In addition to its ability to project voice from an adjustable microphone that is included in this product. The microphone headset with speaker can be positioned near your mouth with its flexible design. The headset sits on top of the head so it is stable and won’t fall off.