Dual-way intercommunication: Two-way voice window intercom counter interphone adopts auto dual-way intercommunication technology,automatic indentification of processing speech signals during a call dose not require any action. | Host & Extension: Both the main unit and the extension have 78.74IN wire speaker and high-sensitive microphone, and the volume can be adjusted separately. | Sound clear: Inside & Outside Volume Adjustable,CallToU Window Speaker system has a top-quality speaker and high-sensitive microphone; The voice from CallToU Window Intercom system is clear and natural. | Wide Aapplication Scenario: CallToU window speaker can be used in many workplaces, such as bank windows, ticket windows, hospital windows, bank windows, glass windows, counter windows, etc | Recording: There is a recording jack that can be connected to recording equipment, which can work continuously and clearly for a long time.Realize two-way recording conversion.

Two-way voice transmission; automatic two-way intercommunication without pressing button; suitable for two-way intercom between hospitals and clinic service desk. | Recording output jack; teller intercom can be connected to external recording equipment; automatically recognize the voice signal being processed during the call; no need to take any measures. | CallToU WI08 window speaker uses a 4 core high-strength aluminum foil shielded wire; strong anti-interference ability; which makes the voice clear and natural. | High power output; intercom speaker system adopts high power input and output technology; loud sound; clear sound quality. | Independent volume control; internal and external volume of window speakert can be adjusted separately according to the environment. | Simple installation; turn on the power and press the switch; the power indicator will remind you of the corresponding working status.