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 1 x Display1 x User Manual1 x Power Supply10 x Transmitters10 x Glue Stickers Item Type: Wireless PagerSU-620 Display Receiver Description: Working Frequency: 433.92MHzMaterial: ABSWorking Voltage: DC 5VWorking Current: 100mA±10mAReceiving Sensitivity: -110dBmDecoding: Learning CodeWaterproof Rating: IPX4Working Temperature: -20℃~ 60℃SU-A01 Button Transmitter Description: Working Frequency: 433.92MHzBattery Model: 23A12VBattery Capacity: 60mahEmission Current: 10mA±3mAStandby Current: <1uAOpen Distance: Approx. >500meter / 1640ftKeys: 1 million timesWaterproof Rating: IPX4Working Temperature: -20℃~ 60℃One Touch: CallHow 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 optionF1-2 Delete pager optionF2-1 Add remote control optionF2-2 Delete remote control optionF3-1 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 secondsF3-3 Cycle interval time 1-99 secondsF3-4 Report number model optionF4-1 Single-key and multi-key options 1 is single-key, 4 is multi-keyF5-1 Volume adjustment options 0-30F5-2 Prompt sound option 0-2F5-3 Number of reports 1-9F6-1 Delete all pagersF6-2 Restore factory settings (and delete all pagers)F7-1 Time setting