Portable Voice Amplifier Voice Amplifier for Teachers Singing Speaking Description: [ High Performance ]: Voice amplifier, bluetooth 5.1(only wireless version with bluetooth), more stable, better sound quality , low power consumption. DSP chip intelligent noise reduction, good sound quality . Large speaker, diaphragm sound amplification, easily penetrate and cover 80m², and the volume is increased by 90 times. [200M Transmission]: Personal voice amplifier, 5W power is evenly amplified, with strong penetrating power , covering every corner easily. Long lasting battery life , 20 days on a single charge. [Dynamic Digital Display]: Portable speaker mic adopts digital display, which can display various information such as function mode , volume receiving mode and so on. [Various Wearing Methods]: Portable voice amplifier, can waist hanging/slanting hanging/snap buckle; microphone, head wearing/ hanging neck. Compatible Bluetooth, Disk, TF card, 3 modes can be selected. [Wide Application]: Voice amplifier is very suitable for teachers, singing, coaching, training, presentation, tour guide and so on.n. Specifications: Material: Package Size: 17.5cmx12cmx6.5cm/6.89inchx4.72inchx2.56inch(LxWxH) Package Includes: Amplifier 1 Wireless Headset (Only Wireless Version Has) 1 Wired Headset 1 Belt 1 Charging Cable