1、The signal pager adopts radio frequency wireless technology, the system is stable, and the signal receiving distance is long. 2、The signal transmitter is small in appearance, easy to carry, and convenient to move and store. 3、The signal display shows the year, month and day, and supports up to 400 pagers. 4、The pager has 30 levels of numerically controlled adjustable volume, so you don' t have to worry about delays due to low volume. 5、The pager is widely used in various places such as homes, hotels, factories, hospitals and offices. 1 x Display1 x User Manual1 x Power20 x Transmitter20 x Sticker Item Type: PagerSU-620 Display Receiver: Working Frequency: 433.92MHzMaterial: ABSWorking Voltage: DC 5VWorking Current: 100mA±10mAReceiving Sensitivity: -110dBmDecoding: Learning codeWaterproof Level: IPX4Working Temperature: -20℃~ 60℃SU-A01 Button Transmitter: Working Frequency: 433.92MHzBattery Model: 23A12V(include)Battery Capacity: 60mahEmission Current: 10mA±3mAStandby Current: <1uAOpen Distance: Approx. > 500meter / 1640.4ftKeys: 1000000 timesWaterproof Level: IPX4Working Temperature: -20℃~ 60℃Single Bond: CallingHow To Use: Button Function: Function key (FUN) Confirm key (ENT) Down key (DOWN) Left and right keys (MOVE) Up key (UP)The Function Options are 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 tone options 0-2F5-3 Number of reports 1-9F6-1 Delete all pagersF6-2 Restore factory settings (and delete all pagers)F7-1 Time setting