Counter Intercom Interphone, Noise-Free Dual-Way Bank/Office/Store/Station Window(US)

Features: Anti-interference and noise-free function. Two-way voice intercom communications technology, automatic identification of processing speech signals during a call does not require any action. Dedicated anti-side tone processing chip, with auto-mute function. Application of completely automated call control, outside the machine's microphone and speakers to use the integration of design and front-line system of the host to connect, easy installation. 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. Application: bank, securities, hospital, bus station Where guard glass again theft is installed. Specifications: Condition:100% Brand New Color: As shown in the picture Plug: 110-240V US, 110-240V EU(Optional) Working voltage: DC12V Maximum operating current: 1A Main sound (sub sound): 3W Inside microphone: --38db±3db  Outside microphone: -38db±3db  Package List: 1*Dual-way Counter Interphone 1*External Speaker 1*12V Power Supply 2*Adhesive 1*Instruction Manual