Features: 1.Using radio frequency wireless technology, the system is stable, and the wireless receiving distance is long. 2.The call button word can be selected and set, and it supports 400 pagers, making notifications more convenient. 3.The display can show the specific time, and there are 30 levels of numerical control volume can be adjusted. 4.Using advanced micro?processing chip, is convenient to move, stable and reliable. 5.Widely used in various places such as homes, hospitals, hotels, restaurants, factories, nursing homes and offices specification:Item Type: Wireless Pager SU-620 Display Receiver Description: Working Frequency: 433.92MHz Material: ABS Working Voltage: DC 5V Working Current: 100mA10mA Receiving Sensitivity: -110dBm Decoding: Learning Code Waterproof Rating: IPX4 Working Temperature: -20~ 60 SU-A01 Button Transmitter Description: Working Frequency: 433.92MHz Battery Model: 23A12V Battery Capacity: 60mah Emission Current: 10mA3mA Standby Current: 500meter / 1640ft Keys: 1 million times Waterproof Rating: IPX4 Working Temperature: -20~ 60 One Touch: Call How to use: Key Function Description: Function key (FUN) Confirm key (ENT) Down key (DOWN) Left and right keys (MOVE) Up key (UP) The Function Options as Follows: F1-1 Add pager option F1-2 Delete pager option F2-1 Add remote control option F2-2 Delete remote control option F3-1 Cycle number option is 0 to display when calling, and other numbers (1-15) represent the number of recent calls. F3-2 Last stay display time 1-99 seconds F3-3 Cycle interval time 1-99 seconds F3-4 Report number model option F4-1 Single-key and multi-key options 1 is single-key, 4 is multi-key F5-1 Volume adjustment options 0-30 F5-2 Prompt sound option 0-2 F5-3 Number of reports 1-9 F6-1 Delete all pagers F6-2 Restore factory settings (and delete all pagers) F7-1 Time setting PackageList: 1 x Display 1 x User Manual 1 x Power Supply 10 x Transmitters 10 x Glue Stickers