NORWII S358 Portable 2000mAH Rechargeable Voice Amplifier with Wired Microphone HeadsetWaistband, Personal Microphone and Speaker for Teachers Tour Guides ect (Black.

Specifications: Output Power: 10W Loudspeaker: 3 inches 2 ohmic magneticspeaker Using Time: 1618hours Charging Time: 23hours FrequencyResponse: 120Hz15KHz Battery:3. 7V/1800mAh, Charging Voltage: USB/DC 5V1A Size: 91. 1*101. 5*37. 8mm/ 3. 6 x 4 x 1. 5 inch1es Net Weight:159. 5g/ 5. 6ounces Package Included: Voice amplifier*1 Metal back clip*1, 3. 5mm audio cable*1 USBC cable*1 Head wearmicrophone*1 Hanging rope*1.