Features:        • Full automatic communication control, duplex voice intercom communication technology automatically recognize and process the voice signal without any operation during communication                  • Stereo output port for both internal and external voice signal output (for bank clerk recording), recording function is not controlled by the power button and function buttons                  • Use high performance components, high output power up to 5W, clear and loud sound quality, high voice resolution Independent mute control button on host unit for both external and internal units, which can be controlled according to the application                  • Elegant appearance design, built-in LED indicator on the buttons for simple use                  • Customized anti-side tone processing chip for automatic squelch control and effectively minimize the howling                  • o signal input function like PC voice prompt for exter                          Product Detail        Specification:        • Operating Voltage: DC 12V/1A        • Max. Output Power: 10W        • Frequency Response: 100Hz-12kHz        • Speaker Impedance: 4Ω        • Net Weight of Host Unit: 580g        • Net Weight of Extension Unit: 220g        • Host Unit Dimensions: 179.7×129.8×56.5mm        • Extension Unit Dimensions: 117.8×83.7×38.9mm                 Application:        Bank, securities company, post office, railway station, payment station, ticket office, hospital                 Product Content:        Master unit    *10pcs        Sub-unit    *10        Adhesive rubber strip    2pcs*10        Adapter     *10        Adhesive EVA foam  2pcs*10        User manual    1pc*10