1The signal pager adopts radio frequency wireless technology, the system is stable, and the signal receiving distance is long. 2The signal transmitter is small in appearance, easy to carry, and convenient to move and store. 3The signal display shows the year, month and , and supports up to 400 pagers. 4The pager has 30 levels of numerically controlled adjustable volume, so you don' t have to worry about delays due to low volume. 5The pager is widely used in various places such as homes, hotels, factories, hospitals and offices. Item Type: Pager SU-620 Display Receiver:Working Frequency: 433.92MHz Material: ABS Working Voltage: DC 5V Working Current: 100mA10mA Receiving Sensitivity: -110dBm Decoding: Learning code Waterproof Level: IPX4 Working Temperature: -20~ 60 SU-A01 Button Transmitter:Working Frequency: 433.92MHz Battery Model: 23A12V(include) Battery Capacity: 60mah Emission Current: 10mA3mA Standby Current: 500meter / 1640.4ft Keys: 1000000 times Waterproof Level: IPX4 Working Temperature: -20~ 60 Single Bond: Calling How 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 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 tone options 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 1 x Display 1 x User Manual 1 x Power 20 x Transmitter 20 x Sticker