**********Note; a protective film is affixed to each watch in order to prevent it from being scratched during inspection and transportation; it is recommended to remove the protective film before use so that the data information on the screen can be clearly seen*****5 Modes; vibration; buzzer and light; vibration only mode is fit for coffee shop; customer cannot be disturbed; prompt time can be 15s; no need to worry about customer can be paged; can customize different key name and prompt mode to fit for different places use*****Can add max 500 callers transmitter button call the same watch receiver; live view and queue view to track all calling records; convenient for manager use*****200m or 656ft from pager to wrist receiver in open area; built in rechargeable 400mAh battery for the watch receiver, USB charging cable also included; with low power indication; 2 pcs 3V CR2016 battery for each 4-key call buttons; standby time 12 months*****With the help of T128 paging system customer