1、30 Levels Volume: 50 paging buzzer system has 30 levels CNC volume, the volume can be adjusted according to your needs. 2、RF Wireless Technology: Restaurant pager systems adopts radio frequency wireless technology, the system is stable, and the wireless receiving distance is long. 3、Wide Application:Pager systems are widely used in homes, hotels, bars, restaurants, factories, workshops, tea houses, bowling alleys, etc. 4、Beautiful Practical: Restaurant pager systems has a fashionable appearance, is easy to move, and can display the time, month, day. 5、Micro Processing Chip: Wireless calling system adopts advanced micro processing chip to make the performance stable and reliable. Item Type: Restaurant Pager Systems 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 Code Waterproof Grade: IPX4 Working Temperature: -20℃-60℃ Button Launcher Parameters: Operating Frequency 433.92mhz Alkaline Battery Model: 12V23A (included) Battery Capacity: 30mah Emission Current: 10ma±3ma Standby Current: <1uA Open Distance: >200 Meters Keystrokes: 1 Million Times Waterproof Grade: IPX7 Working Temperature: -20℃-55℃ 1 x Receiver 50 x Pagers 50 x Film 1 x User Manual 1 x Adapter