Features: 1.5 Modes: Comes with 5 modes to choose from, 0: NO.xx get food. 1: NO.xx take food. 2: NO.xx treatment. 3: NO.xx come in. 4: NO.xx call. 2.Support: Support 1 keyboard with multiple displays, or multiple keyboards with 1 display. 3.High Definition Language Broadcast: The wireless pager system can be connected to an external speaker, and can be broadcast in high definition language. 4.Applicable Scene: Suitable for restaurants, teahouses, banks, coffee shops, milk tea shops, factories, hospitals, service halls and other queuing places. 5.Simple Operation: The wireless pager system has simple operation, easy to use, and can be used by pairing with the receiver. specification:Item Type: Wireless Pager System Material: ABS Display Receiver Parameters: Operating Frequency: 433.92MHz Working Voltage: DC 5V Waterproof Grade: IPX4 Working Temperature:-20 to 60 Support: Support 1 Keyboard with Multiple Displays, or Multiple Keyboards with 1 Display Speaker: Can Be Connected to External Speakers, High Definition Language Broadcast Comes with 5 Modes to Choose From: 0: No.xx Get Food 1: No.xx Take Food 2: No.xx Treatment 3: No.xx Come In 4: No.xx Call Keyboard Launcher Parameters: Working Voltage: DC 5v Working Frequency: 433.92mhz Working Current: