1、EASY SETUP: The keyboard offers 6 options for setting ID, buzzer number, alarm duration, buzzer speed, vibration switch, and light switch. Simple and straightforward operation with a separate keypad. 2、LONG TRANSMISSION DISTANCE: The transmitter has a long range, allowing customers to sit anywhere in the restaurant or nearby area, while waiting for their order to be available. 3、LONG BATTERY LIFE: The buzzer has a 200mAh lithium battery, supporting single use duration of up to 25 hours, avoiding frequent charging to save costs and increase efficiency. 4、HIGH EFFICIENCY SERVICE: Easy to understand and operate with a separate keypad, quickly matching orders and settings in real time. The queue system can cover a reception distance of 700 meters in an open area and has waterproof and oil resistant capabilities. 5、1 TO 20 PAGERS: Convenient for up to 20 customers to take a break or move around after placing their order, without having to wait in line at the counter. Item Type: Buzzer pager Material: ABS, PC Weight: Approx. 1720g / 60.67oz Base Size: 225x150x25mm / 8.9x5.9x1in Buzzer Size: 90x50x10mm / 3.5x2x0.4in Buzzer Battery: DC3.7V lithium battery 200mAh(included) Frequency: 433MHz Power: DC12V(main unit), DC12V(keyboard) Buzzer Quantity: 20 Range: 700m in open space Duration: 25 hours Support Quantity: 999 Alarm Method: Vibration, beep, flash Application: Restaurant, bar, coffee house 1 x Pager Base 20 x Buzzer 2 x Plug 1 x Keyboard 1 x Manual