Feature: 1. 3 ALERT MODES: The wireless call system supports vibration, buzzer, and flashing modes to effectively remind customers. You can also choose vibration and flashing modes when playing music, providing a better reminder experience. 2. EXTENDED RANGE: Utilizing advanced frequency modulation technology, the paging system can work at a distance of over 1640 feet, allowing customers to wait in open areas or inside their vehicles. 3. CONVENIENCE AND EFFICIENCY: The restaurant pager system can display the last 10 call records, making it easy to identify customers who may have missed their alerts. This vital feature ensures quick and efficient, significantly reducing customer wait times. 4. LONG STANDBY TIME: Each restaurant pager comes with a built in 200mAh rechargeable battery, providing a standby time of up to 12 hours, enhancing customer experience by ensuring that no calls or alerts are missed. 5. STABLE DESIGN: The restaurant buzzer features a large size for stability, while the charging dock provides added stability during charging, ensuring a secure connection without the risk of disconnection. Specification: Item Type: Restaurant Pager System Material: ABS, Electronic Main Unit: Input Power: DC12V 2A Transmitting Frequency: 433.92MHz Transmitting Distance: Approx. 500m / 1640ft Charging Slots: 20 Available Sub Units: 998 Key Mode: Touch Key Sub Unit: Receiving Frequency: 433.92MHz Receiving Sensitivity: -108dBm Transfer Distance: Approx. 500m / 1640ft Standby Time: 12 hours Notification Method: Vibration, Buzzer, Flash Reminder Duration: 1-999 seconds adjustable Single Sub Unit Battery Type: Built in 200mAh Polymer Lithium Battery (included) . Package List: 1 x Main Unit 20 x Sub Unit 1 x Adapter 1 x User Manual