Features 1、RF Wireless Technology: RF wireless technology, with stable system, long wireless receiving distance. 2、Display Receiver: Display receiver supports 400 pagers, supports single button or 4 button pagers. 3、Button Transmitter: Call button word selectable, call buttons that start with ABCDEF letters can be named, single or list display mode. 4、Characteristics: Fashionable appearance and easy to move. 30 level digital control volume can be adjusted. The time, year, month, and date can be displayed. 5、Uses: Using advanced micro processing chip, the performance is stable. Widely used in hotels, bars, restaurants and offices, etc. Specification 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 Package List 1 x Display Receiver 20 x Button Transmitter 20 x Film 1 x User Manual 1 x Adapter