Briefly summarises the scientific benefits of using a loudspeaker for teaching! 

Intеrреrѕоnаl communication оftеn suffers wіthоut a сlеаr, strong vоісе. Pаrtісulаrlу іn group ѕіtuаtіоnѕ, amplifying the vоісе can enhance learning and information dissemination.

Nefficar's Portable Voice Amplifier Loudspeaker with Microphone is a portable voice amplifier or a PA system that comes with a microphone and also works as a speaker.  It contains a natural sound and also comes with an Aux cable.  It has an inbuilt TF card reader and a USB flash drive.  This loud speaker is ideal for Emcees, teachers, instructors, tour guides, anchors, trainers and also those who need to sing or communicate with a large crowd of audience.    The Portable Voice Amplifier Loudspeaker has the following main key features and specifications. Ultra portable  The Portable Voice Amplifier Loudspeaker is...