EFFICIENT COMMUNICATION:The guests only need to press the call button, and the display screen will display and broadcast the table number, thereby reminding the restaurant waiter;Using a watch, you can receive calling service from any corner of the store 3 TYPES OF DISPLAY:Support 3 number display modes,single group,4 groups,8 groups;Standby with date and time display;Support 4 languages including English,Japanese,German,Spanish;0-9 level volume,0=mute;With a remote control,easy to use EXTRA LARGE DISPLAY:The size of the black display screen is 16.93x4.64x1.18inch,and it is compatible with 400 call buttons in different numbers named 001 to ZZZ;Support external active speakers, no longer worry about customers not hearing it LONG RANGE USE DISTANCE:Cover 500m/1640ft in outdoor open areas.Walls and other objects may decrease transmission range,the indoor signal range is about 100-300m/328-984ft,depends on the actual use environment;Wnkrun's amplifiers can be added for stronger signals and longer distances MULTIPLE SCENE APPLICATIONS:Wireless restaurant pager system applied to restaurants, hotels, food trucks, bars, etc, it can help you improve the quality of service;Professional after-sales team all day online service How It Works? When the customer has a need, he can just press the call button, the calling signal will be transmitted to the display host and the pager watch instantly, so that the frontdest and the waiter can be noticed in time and come to the table to provide service. Wireless Calling System is dedicated to improve restaurant service efficiency, save staff cost and ensure a nicely dining environment. Specification of Display Host: Power Supply:12V1A Size(mm):430*118*30 Shell Material:Aluminum +ABS+PC Support externa signal amplifier if you want to extend signal range Specification of Call Button: Battery: 12V23A built-in battery Size:φ60*31mm / Diameter 2.36 inch,Height 1.22 inch