Thank you for viewing. This is a set of a portable amplifier and a wireless microphone. The manufacturer is TOA. The configuration is as follows: Portable speaker WA-2800IF 1 unit Digital tuner WTU-D2810 1 unit Digital hand microphone WM-D1210 1 unit The total list price is 377,100 yen. It has been used only 2 or 3 times and is almost new. Everything is set up, so it's ready to use as soon as you turn it on. The wireless microphone uses AA batteries. For more details, please download and check the instruction manual from the manufacturer's website. https://www.toa-products.com/download/detail.php?h=WA-2800IF&_gl=1*ehxte6*_ga*MTc2MzIyNzU3Mi4xNzQ0NDEwOTYx*_ga_C6BT1HLW61*MTc0NDQxMDk2MC4xLjEuMTc0NDQxMTA1NS41NC4wLjA. It seems that it can also be used with batteries if there is no power source. Suitable for: Online seminars Training sessions Web conferences Events Demonstration sales Sales events Hybrid classes Online interaction Information sessions Meetings Disaster prevention Factory tour guidance Streaming Dance Commentary Speeches Elections Street speeches Festivals Neighborhood associations