Built in battery indicator: Each pager has built in rechargeable lithium battery , low battery indicator , charge indicator.
You can add up to 999 pagers: Know the code registration mode , you can add up to 999 pagers easily.
Three prompt modes: There are three prompt modes: vibration , buzzer , vibration + buzzer , each mode is accompanied by LED flashing.
Dual host setup: Dual host settings that can be placed separately can also call at the same time.
Long working distance: External antenna, open area working distance is about 1000 meters (3280 feet).