Dual way counter interphone

now you can safe your enhanced building security. for your residents, their home is their safe place by using communication tools!

• ideal for the bank. securities. hospital. bus station etc.
•  where guard glass again theft is installed.
•  main unit is made of luxurious aluminum alloy and internal microphone for extension.
•  one-wire connection and simple installation.
•  high quality speaker for main unit and extension.
• high sensitive microphone. longer metal tube microphone for dual-way intercommunication.
• adjustable volume with separate switch.