Da.Beatz. 3W Window Intercom System, Noise Free Dual Way Intercommunication Microphone for Bank, School, Store  (Silver)

window speaker will empower your business in a crystal and smooth way. Specification: Working voltage: AC9V/1A Inside microphone: -48db 20Hz-20KHz Outside microphone: -48db 20Hz-16KHz Exterior size: 158x87x46mm / 78x20mm Hot Spots: High-quality speaker for main unit and extension. High sensitive microphone. Longer metal tube microphone for dual-way intercommunication Adjustable volume with separate switch Auto dual-way intercommunication without pressing any button External speaker,& slim fit design Inside and outside the two-way voice signal output(recording by the bank teller), a stereo jack output mode can prevent voice recording function controlled by the power switch and the function buttons strong, Smart microphone, Excellent metallic material microphone not only transmit clearly but also could adjust the height according to your needs.