Feature: 1. Radio Frequency Wireless Technology: The pager system is stable and the wireless receiving distance is long 2. Support Pagers: The display receiver supports 400 pagers, supports single key or 4 key pagers, call button words can be selected, single or list display mode 3. Multifunction: The call button can be named with the letter ABCDEF at the beginning, the time, month, day can be displayed, and the 30 level numerical control volume can be adjusted 4. Microprocessing Chip: This product adopts advanced microprocessing chip, which makes its performance stable and reliable Fashionable and novel design, easy to move 5. Multipurpose: Widely used in various places such as home, hotel, bar, restaurant, factory, workshop, tea house, clubhouse, bowling alley, massage room and country club, hospital, health club, and office Specification: Item Type: Wireless Calling System Product 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 Code Waterproof Grade: IPX4 Working Temperature: -20℃~ 60℃ Button Launcher 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: >200m Keystrokes: 1000000 Times Waterproof Grade: IPX4 Working Temperature: -20℃~ 55℃ Four Keys: Call, Checkout, Order, Cancel. Package List: 1 x Display Receiver30 x Button Launcher30 x Film1 x User Manual1 x Adapter