1、RF Wireless Technology: Using radio frequency wireless technology, the system is stable, and the wireless receiving distance is long 2、Display Receiver: The display receiver supports 400 pagers, supports single button or 4 button pagers 3、Button Transmitter: Call button word selectable, single or list display mode, can name the call button starting with ABCDEF letters 4、Characteristics: The 30 level digital control volume is adjustable, and it can display the time, year, month, and date It has a stylish appearance and is easy to move 5、Uses: Using advanced microprocessor chip, the performance is stable and reliable Widely used in hotels, bars, restaurants, etc Item Type: Restaurant Pager System Material: ABS Display Receiver Parameters: Operating Frequency 433.92mhz Working Current: <130mA Standby Current: <550mA Modulation Method: ASK Receive Sensitivity: Better Than -105db Decoding: Learning to Coding Waterproof Grade: Ipx4 Working Temperature: -20℃ to 60℃ Button Transmitter Parameters: Operating Frequency: 433.92mhz Battery: 2 x Built in Cr2016 Button Batteries (included) Battery Capacity: 80mah Emission Current: 10ma±3ma Standby Current: <1ua Open Distance: >200 Meters Keystrokes: 1 Million Times Waterproof Grade: Ipx4 Working Temperature: -20℃ to 55℃ Four Keys: Call, Checkout, Order, Cancel 1 x Display Receiver 10 x Button Transmitter 10 x Film 1 x User Manual 1 x Adapter