1、Advanced Technology: The wireless calling system utilizes advanced digital encoding technology, supporting up to 400 calling devices. It is an essential tool for enhancing service quality. 2、Long Range: With a reception range that exceeds 200 meters (656.2 feet), this system operates reliably in open areas. Users can enjoy stable connectivity, making it suitable for large venues. 3、Large Display Screen: The receiver features an oversized display screen that provides real time call information with accurate visibility. And the visual distance extends beyond 50 meters. 4、Adjustable Volume Level: The system offers 30 levels of volume adjustment, allowing users to modify the sound output according to the environment's needs. Users can easily adapt the volume, ensuring effective paging in different settings. 5、Customizable Call Buttons: It supports personalized naming for call buttons, making it easier to identify. It is widely used in hotels, restaurants, coffee shops, hospitals and so on. Item Type: Wireless Calling System Material: ABS Display Receiver: Operating Frequency: 433.92MHz Operating Voltage: Direct Current 5V 1A Operating Current: <130mA Standby Current: <550MA Receiving Sensitivity: -105dBm Decode: Learning Code Watertight Rating: IPX4 Operating Temperature: -20°C to 60°C Pushbutton Transmitter: Operating Frequency: 433.92MHz Battery Type: 2 x CR2032 (Built in) Individual Battery Capacity: 225mAh (Built in) Transmit Current: 10mA±3mA Standby Current: <1uA Open Distance: >200m / 656.2ft Keystrokes: 1,000,000 Times Watertight Rating: IPX4 Operating Temperature: -20℃-55℃ Single Key: CALL 1 x Receiver 30 x Transmitter 30 x Adhesive Sheet 1 x Adapter 1 x Instruction Manual