1. Window Drive through Intercom Kit is for Restaurant/Cafeshop/Retails/Box Offices/Ticket Office/Banks etc Window Services.  Includs Master Station and  sub-station.
2.  Plug-N-Play; No special installation required.  Sub-station and Master station is connected through a single bundle of wires. Kit contains everything you will need.
3. Both master station and substation has excellent sound volume for window drive through service.  Proper enclosure is required  to shield the substation from rain and  snow etc. when installed outside.   
4. Full-Duplex Automatic VOX (Voice Activated) 2-way hands-free communication.
5.  Attractive appearance and high sound quality. Master station (inside unit) comes with metallic finish, Sub-station (outside unit) comes with high-strength engineered plastics housing in beige color.
6.  Individual volume controls for both master station speaker and window sub station speaker.
7.   If connected with Kitchen Monitering Master Station, conversations can be monitored in real-time in background (by owners, supervisors, or chefs) for each service  point. Owners, supervisors, or chefs can provide assistance to each window service representatives. Chefs can also learn what have been ordered. Both the owners/supervisors/chefs and the window service representative(s) can initiate talks. This "supervisor-talk-in" conversation mode can not be heard by outside windows.
      This option is typically used in places where the electronics ordering systems are not available, thus communication between Point-of-sales window service representative and kichten staff becomes a headache.