1、LONG RANGE CALLING SYSTEM: This display pager system employs digital coding technology, capable of supporting up to 400 call buttons while ensuring a stable wireless transfer range. 2、LARGE DISPLAY SCREEN: Featuring an oversized display screen, this system allows for a visible distance of over 50 meters, providing real time and accurate call information. 3、ADJUSTABLE VOLUME LEVELS: 30 levels of volume adjustment to cater to different environments and needs. This flexibility ensures that notifications are always heard without causing disruptions. 4、PORTABLE AND STYLISH DESIGN: Featuring a modern design, this wireless call system is easy to move and adapt to various environments such as hotels, restaurants, and offices. 5、PERSONALIZED AND EFFICIENT: The innovative design allows for personalized naming of call buttons, making it easier to identify specific needs and enhancing service efficiency. Item Type: Wireless Call System Display Receiver Parameter: Work Frequency: 433.92MHz Material: ABS Working Voltage: DC5V1A Working Current :<130mA Standby Current: <550MA Receiving Sensitivity :-105dBm Decoding: Learning Code Water Resistant Rating: IPX4 Operating Temperature :-20℃- 60℃ Button Transmitter Parameter: Work Frequency: 433.92MHz Battery Type: CR2032 Battery 2 (included) Single Battery Capacity: 225mAh (included) Transmitting Current: 10mA±3mA Standby Current: <1uA Open Distance: >200 meters Button: 1 million times Water Resistant Rating: IPX4 Working Temperature: -20 ℃-55 ℃ Single Button: CALL 1 x Display Receiver 20 x Table Bell Buttons 20 x Film 1 x Adapter 1 x User Manual