1、3 Reminder Modes: This wireless calling system has 3 reminder modes: vibration, buzzing, and flashing; When playing live music, vibration and flashing modes can be selected to better remind customers 2、Long Distance: Using advanced frequency modulation technology, the paging system has a working distance of over 800 meters (2625ft), making it convenient for customers to wait in open areas or in their own cars 3、Calling Record: The restaurant calling system can view the last 10 call records, making it convenient to know which customer missed calling, reducing unnecessary trouble, and improving work efficiency 4、Built in Battery: Each restaurant pager has a built in 200mAh rechargeable battery with a standby time of up to 20 hours, which is convenient and practical, without the need to connect to a power source 5、Stable Charging: The wireless calling system host has a sturdy structure and longer charging stations, making it easy to charge the receiver. It is stable and does not detach, making it ideal for use in restaurants Item Type: Wireless Calling System Main Unit: Input Power: DC12V 2A Transmitting Frequency: 433MHz Transmitting Distance: Approx. 800m / 2624.7ft (open visual distance) Number of Charging Sub Machine: 24 Number of Compatible Sub Machine: 998 Key Mode: Touch Key Size: Approx. 230 x 226 x 31mm / 9.1 x 8.9 x 1.2in Sub Unit: Receiving Frequency: 433MHz Receiving Sensitivity: -108dBm Transmitting Distance: Approx. 800m / 2624.7ft (open visual distance) Standby Time: 20 hours Prompt Methods: Vibration, Buzzer, Flash Reminder Duration: 1-999 seconds setting Single Sub Machine Battery: 200mAh Lithium Polymer Battery (Built in) 1 x Main Unit 24 x Sub Units 1 x Main Unit Antenna 1 x Adapter 1 x User Manual