hand free talk through glass bank window interphone

Meeyi service calling receiver display keypad wireless waiter system in restaurant, which can avoid to stand in a long queue.  

emegency call ip video door intercom used in school, bank, hotel, parking, airport, subway, train station

waterproof security ip phone surveillance intercom system

touch screen ip intercom microphone: call transfer; busy transfer; missed call reminder; monitor; braodcast