Feature 1Speaker and Mic: This intercom system features premium speaker and high sensitivity microphone, designed for counter and dual way interworking. 2Simple Operation: Just connect the power adapter and external speakers to the main station, and there are 2 knobs to adjust the internal and external volume. 3Pure Sound Quality: Using excellent electro acoustic circuit device, the main and auxiliary machines are both 5W high power output, with clear voice and high resolution. 4Auto Call Control: Adopt duplex voice intercom communication technology, automatically recognize and process voice signals without other operation. 5Wide Application: Suitable for places where safety glass is installed, such as banks, ticket offices, hospitals, post offices, embassy visa offices and station window, etc.Item Type: Dual Way IntercomMaterial: ABSColour: BlackOutput: DC 12V 1000mAWorking Voltage: DC 12V 1APeak Output: 2 x 5W (Maximum)Speaker Impedance: 4Frequency Response: 100Hz-12KHzScope of Application: Suitable for places where safety glass is installed such as bank window, ticket office, hospital window, post office window, security window, embassy visa office, securities company, station, etc. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Host1 x Auxiliary Machine1 x Power Adapter2 x Adhesive2 x Wire Clamps1 x Blowout Cover1 x User Manual