Two-way intercom microphone with monitoring

GM-22PH is a paging microphone with cardioid polar pattern for general public address and communication use.
It can be use on ticket booth, reception ,information center, conference system, church, broadcasting.
And also can application for bank, post office, cashier desk ,railway station, stock-exchange.
Yo-tronics is a headphone ,and microphone supplier, manufacturers in Taiwan.