Home Security Zero-touch Loudspeaker Dual-way Interphone System For Bank Counter Ticket Office Hospital Window Intercom Home Security Zero-touch Dual-way Interphone Intercom System For Bank Counter Ticket Office Package List: 1 x Counter intercom; 1 x External speaker; 1 x Power adapter (Approx. 1.6m/63in); 1 x Double-sided tape; 1 x English manual Functions and Features of E340 1.Fully automatic hands-free two way intercom. 2.Microcomputer control circuit, with squelch function, can effectively solve the echo and screaming problem. 3.The window intercom has a built-in high-power speaker, the sound is loud and powerful, the voice is realistic and clear. 4.Simple installation, only one extension cord is required to connect,the cord is around 3m/9.8ft. 5.360omni-directional sound pickup design, can effectively capture and transmit sound. Power Adapter Information: Input AC 100-240V 60Hz; Output DC 12V 0.5A; Main unit dimension: 160*85*45mm; External speaker dimension: 80*20mm About Counter Intercom Two-way voice transmission technology automatically recognizes and processes voice signals during a call without any operation. Plug and play, simply connect the power adapter and external speaker to the master station then press the power switch to start the talking. The volume of the master station and external speakers can be adjusted separately; the left volume knob is for the master station and the right for the external speakers. The microphone features a 360-degree pickup design that can be adjusted to the appropriate angle based on the mounting location and the height of the user. There is a 3.5mm recording jack, which can be connected to external recording equipment to meet your different office needs. _x000D_