Features 1、RF Wireless Technology: RF wireless technology, stable system, long wireless receiving distance, 30 level digital control volume adjustable 2、Support 400 Pagers: Wireless guest pager display receiver supports 400 pagers, supports single button or 4 button pagers 3、Named Call Button: Restaurant wireless paging system can name the call button starting with ABCDEF letters, and can display the time, year, month and day 4、Reliable and Stable: Wireless guest pager adopts advanced micro processing chip to make its performance stable and reliable, call button word can be selected, single or list display mode 5、Applicable Scenarios: Used in various places such as homes, hotels, bars, restaurants, factories, workshops, tea houses, clubs, bowling alleys, massage rooms, churches, country clubs, hospitals, health clubs, and offices Specification Item Type: Restaurant Pager System Material: ABS Display Receiver Parameters: Operating Frequency 433.92MHz Material: ABS Working Current: <130mA Standby Current: <550mA Modulation Method: ASK Receive Sensitivity: Better Than -105dB Decoding: Learning to Code Waterproof Grade: IPX4 Working temperature:-20℃ to 60℃ Button Launcher Parameters: Operating Frequency 433.92MHz Material: ABS Battery: 2 Built in CR2016 Button Batteries (Included) Battery Capacity: 80mAh Emission Current: 10mA±3mA Standby Current: <1uA Open Distance: >200meters Keystrokes: 1 Million Times Waterproof Grade: IPX4 Working Temperature:-20℃ to 55℃ Four Keys: Call, Checkout, Order, Cancel Package List 1 x Display Receiver 40 x Button Launchers 40 x Film 1 x User Manual 1 x Adapter